Mangoh red loses its time

Hi, I’m using several mangoh red boards with WP7502 module and framework version 18.06.4. Somehow some of devices lose their clock time after certain amount of time. Clock time is updated with qcom time. I have a logging tool in my app to help me debug time issues and I see that at some point (like once a day), time just changes. Sometimes the clock gets time wrong for even hours, so it seems to be timezone-related problem but then again sometimes the clock just gets random time. What might be the problem here, I guess it shouldn’t be framework version-related problem? Could it be something to do with Linux clock interacting with Legato clock?