by Zhivko Zhelyazkov.
Thank you for your response, Emma.
I opened the Scheduled Tasks and they were all set to Default. Tried to play with some configurations but no result.
For example, here I changed the minute setting of Background processing for messaging from 35 to * and no effect.
Also, I noticed that a lot has happened at 11:15 but I hardly see any minute settings setup for 15.
Which one I should change? Is there a main one somewhere, which makes several things run at minute 15, and overwrites these settings?