BG95M3 Xtra Data Usage

We are running a trial in USA. The data usage of Xtra file (72hr) was significantly different when the device moved between two locations ~12km apart, see attachment.

What could be the possible reason causing the differences?

for 72hours data ,the normal size should be 20~30K byte Please check your data statistics method and Avoid duplicate data being counted retransmission data be caused by bad signal

The data traffic was counted by Hologram (MVNO) and we can do nothing.

What will BG95 do when the signal is not strong? Will it retry for a number of times before it aborts the download?