Private group Admin accepts user but group activity feed says admin is new user

[gibbyesl]

I have a private group and when I accept the user to the group, in the groups activity feed, I am the new user of the group NOT the other person!!! Also my avatar is replaced with a default avatar image in the activity feed
1.2.4.1
2.9.2 not MU default theme

[DJPaul]

To expand on this report.

When a Person B requests to join Person A's Private Group, and Person A accepts the request, in the Private Group's Activity Stream, the bp_activity record is incorrect. The user_id in the database record is 0.

Joining a Private Group via a Group Invitation works fine, however.

[DJPaul]

le patch

[DJPaul]

Patch built against 1.2 branch, rev 3055.

[johnjamesjacoby]

(In [3061]) Fixes #2413 props paulgibbs