Account Merge doesn't work properly

[MSoeb]

Describe the bug
The account merge is no longer working properly. After the merge, the imported meetings are not displayed. The imported meetings are not visible in either the account list or the account details. However, the account is correctly displayed in the imported meetings.

action : "user.merge_together" data : Array(1) 0 : id : 1074 user_ids : Array(1) 0 : 1075 length : 1

How to Reproduce

1. predcondition: Two Accounts in two different meetings.
2. Open Account list > Multiselect > Select the two accounts > Account Merge
3. The meeting number won't count upwards and in the details the "new" meeting is not listed.

Expected behavior
Acocunt merge should work properly and show the new "imported" meetings in Account list and Account detail view.

Additional information
I guess it's client bug, because the action itself seem to work correctly.

[reiterl]

Perhaps a similar problem like the accounts add to meeting. I would wait here, until that has a solution and
retest.