Very high mobile data usage (again)

(Issue title)

Summary

I am on Santoni (latest built) and was facing an issue with an excessive mobile data usage, similar to the case reported here (https://gitlab.e.foundation/e/os/android/issues/15). I put the phone on Data saver mode allowing unrestricted use only to

Calendar
Mail
Messag
Net-C-Junior
Notes
Signal
Telegram
Weather
Wire None of them have been excessively used this morning.

Relevant logs and/or screenshots

Log file logcat_06-07-2019_12-20-46_excessive_data_usage.txt

and screenshot

Edited Jun 07, 2019 by Ralph Böhlke