No traffic from receiver for 1 second

I performed 4 flights on this site a couple days ago
flight 1 - good trajectory output
flight 2 - average trajectory output
flight 3 - .gps file stops abruptly after 6 minutes recording (file services.log shows no traffic from receiver).
flight 4 - no .gps file recorded (zero information from receiver).
(between flight 3 and 4 I did not turn the unit OFF/ON at the field, I just stop recording, swap batteries and start recording again).

2025-07-07-15-32-56.705167274 DWR: Queue size = 2
2025-07-07-15-32-57.000739793 IMU: IMU nSec = 66274, GPS nSec = 730857, latency = 664583, IMU Flags = PPS
2025-07-07-15-32-57.193080128 RCV: Receiver received TM2, flags = 0xf5, time is valid
2025-07-07-15-32-57.193658467 RCV: Adjusting clock by 7 microsec
2025-07-07-15-32-57.194065138 RCV: Gurrent Unix time: 1751902377.193826, TOW: 142395.000018, delta: 315964781.999986, scaler: 1.000001, freq: 36516, offset: 0
2025-07-07-15-32-57.194344141 KRN: $GPRMC,153257.000,A,2612.4429319,S,04958.1542980,W,0.000,000.0,070725,0.0,E,A*0e

2025-07-07-15-32-57.839467180 CM0: Camera #0 captured the image -252 ms before deadline
2025-07-07-15-32-57.907364553 CM0: Camera #0 delivered the image -320 ms before deadline
2025-07-07-15-32-57.973249904 CM0: Camera #0 wrote 9970702 bytes to 00000000000000003282767105092238_1435937593867517_1435937593873429.jpg
2025-07-07-15-32-57.973406572 CM0: Camera #0 is sleeping for -386 ms
2025-07-07-15-32-58.000769524 IMU: IMU nSec = 72750, GPS nSec = 755757, latency = 683007, IMU Flags = PPS
2025-07-07-15-32-58.192348848 RCV: Receiver received TM2, flags = 0xf5, time is valid
2025-07-07-15-32-58.192873187 RCV: Adjusting clock by 6 microsec
2025-07-07-15-32-58.193105523 RCV: Gurrent Unix time: 1751902378.192981, TOW: 142396.000015, delta: 315964781.999989, scaler: 0.999998, freq: 36516, offset: 0
2025-07-07-15-32-58.193272525 KRN: $GPRMC,153258.000,A,2612.4406820,S,04958.1568659,W,0.000,000.0,070725,0.0,E,A*0e

2025-07-07-15-32-58.496596678 DWR: Queue size = 419146
2025-07-07-15-32-59.000761585 IMU: IMU nSec = 79249, GPS nSec = 741310, latency = 662061, IMU Flags = PPS
2025-07-07-15-32-59.182541626 RCV: Receiver received TM2, flags = 0xf5, time is valid
2025-07-07-15-32-59.183017630 RCV: Adjusting clock by 4 microsec
2025-07-07-15-32-59.183221632 RCV: Gurrent Unix time: 1751902379.183089, TOW: 142397.000018, delta: 315964781.999991, scaler: 0.999997, freq: 36516, offset: 0
2025-07-07-15-32-59.183323967 KRN: $GPRMC,153259.000,A,2612.4384560,S,04958.1594219,W,0.000,000.0,070725,0.0,E,A*08

2025-07-07-15-33-00.003132997 IMU: IMU nSec = 85725, GPS nSec = 3104690, latency = 3018965, IMU Flags = PPS
2025-07-07-15-33-00.232883362 CM0: Camera #0 captured the image -259 ms before deadline
2025-07-07-15-33-00.293619812 CM0: Camera #0 delivered the image -320 ms before deadline
2025-07-07-15-33-00.352313579 CM0: Camera #0 wrote 9901378 bytes to 00000000000000003282767105092238_1435937596227574_1435937596233488.jpg
2025-07-07-15-33-00.352467913 CM0: Camera #0 is sleeping for -378 ms
2025-07-07-15-33-00.723436990 DWR: Queue size = 1898194
2025-07-07-15-33-00.989072621 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-01.000774707 IMU: IMU nSec = 92199, GPS nSec = 753819, latency = 661620, IMU Flags = PPS
2025-07-07-15-33-01.989301063 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-02.000771436 IMU: IMU nSec = 98675, GPS nSec = 746292, latency = 647617, IMU Flags = PPS
2025-07-07-15-33-02.752502321 CM0: Camera #0 captured the image -399 ms before deadline
2025-07-07-15-33-02.836828607 CM0: Camera #0 delivered the image -484 ms before deadline
2025-07-07-15-33-02.913317200 CM0: Camera #0 wrote 11030057 bytes to 00000000000000003282767105092238_1435937598588347_1435937598594264.jpg
2025-07-07-15-33-02.913469534 CM0: Camera #0 is sleeping for -560 ms
2025-07-07-15-33-02.989509792 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-03.000798831 IMU: IMU nSec = 105150, GPS nSec = 761433, latency = 656283, IMU Flags = PPS
2025-07-07-15-33-03.102313509 DWR: Queue size = 6180057
2025-07-07-15-33-03.989763522 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-04.000778226 IMU: IMU nSec = 111624, GPS nSec = 752573, latency = 640949, IMU Flags = PPS
2025-07-07-15-33-04.990053918 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-05.000819954 IMU: IMU nSec = 118100, GPS nSec = 776047, latency = 657947, IMU Flags = PPS
2025-07-07-15-33-05.036820076 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-05.037026410 RCV: Configuring uBlox
2025-07-07-15-33-05.320059705 CM0: Camera #0 captured the image -406 ms before deadline
2025-07-07-15-33-05.387659601 CM0: Camera #0 delivered the image -474 ms before deadline
2025-07-07-15-33-05.413280355 DWR: Queue size = 2623319
2025-07-07-15-33-05.454524828 CM0: Camera #0 wrote 11086186 bytes to 00000000000000003282767105092238_1435937601148092_1435937601154011.jpg
2025-07-07-15-33-05.454661828 CM0: Camera #0 is sleeping for -541 ms
2025-07-07-15-33-05.990490314 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-06.000781349 IMU: IMU nSec = 124550, GPS nSec = 747854, latency = 623304, IMU Flags = PPS
2025-07-07-15-33-06.887587693 DWR: Queue size = 393
2025-07-07-15-33-06.990796377 RCV: No traffic from receiver for 1 second!
2025-07-07-15-33-07.000784078 IMU: IMU nSec = 131024, GPS nSec = 751995, latency = 620971, IMU Flags = PPS
2025-07-07-15-33-07.754791971 CM0: Camera #0 captured the image -299 ms before deadline
2025-07-07-15-33-07.822938536 CM0: Camera #0 delivered the image -368 ms before deadline
2025-07-07-15-33-07.890618765 CM0: Camera #0 wrote 11110410 bytes to 00000000000000003282767105092238_1435937603668200_1435937603674112.jpg
2025-07-07-15-33-07.890810766 CM0: Camera #0 is sleeping for -435 ms
2025-07-07-15-33-07.991036106 RCV: No traffic from receiver for 1 second!

Did anyone faced this issue before?
The weird thing is that after this problem I did a new work with 5 flights and all went ok, no issues

maybe the gps antennae was not fully secured and the vibrations made it come loose?

if this is not the case you should send the log to rock and they might be able to tell you something.

i m curious why you stop recording to swap batteries. is this because you are using rock pilot app? you can do many battery swaps on one mission usually with no problems.

Thanks for your response, the antenna connection issue is a possibility, will double check this in between flights. And the stop/start between swap batteries was just a way to get small process files, if you do hot swap and still recording for 2 or 3 flights it will take ages to process, a single file can go easy to 30GB.