Thanks for the bug report and trying Asset Link! I haven’t played with it much with 4.x yet so I’m not surprised that there’s issues.
I’ve gotten a bit sidetracked (should we make “maintracked” a word?) with some other Spring projects here, but I was realizing that I probably also need to fix a few (data model related) things in Asset Link related to 4.x so look out for another release soon. Hopefully I’ll be able to reproduce/fix this issue at the same time.