Log time mismatch

Hello everyone!!! I've found a timestamp issue during a ltm log review. It starts normally but after a few events the clock goes backwards and forward.

 

Please see the attached picture:

 

 

This issue happens in both units of an HA Pair with TMOS 11.6.0 Final (No HF Applied)

 

Any ideas?

 

Regards Sebastian Aguirre G.