Hi, this is not really a support topic, more of something I’ve stumbled upon:
We had this situation where we needed to merge two users where the one being merged and deleted afterwards had more than 4500 posts.
Using core functionality we’ve got an error message after some minute into the merging, a bit like a timeout (can’t recall exactly what what written there) and the process seemed to have died there.
After a while we’ve tried using the old Merge plugin (Merge Users Plugin) and it seems to have worked flawlessly. The process ran in the background for several minutes/hours? and after that we received a system message stating that the merge was successfully completed.
What would be interesting to know is if the core functionality also works/progresses as a background task like the old Merge plugin despite the timeout. If so, it means we shouldn’t need to use the plugin at all.