Found a way to break the script make the script operate in an non-optimal fashion:
Try to update more than a single page of recordings.
Try this example… A search of “Something” on “Todd Terry” gives you two pages of recordings. The “Loading Performance Relationships” gets lost in a spinning circle never stopping.
Why do I think this is related to the second page? Because we can split this search into two single pages and it now works.
Search " Something Going " and " Something Goin’ "
Now you can use the script as expected.
Same issue here: Rosie Gaines - Recordings - MusicBrainz when searching “Rosie Gaines” for “Closer than Close” and it runs over two pages… just no way to split that one.