Scrivener and Scapple mdimporters appear to clash

Indexing (spotlight and Foxtrot) for Scrivener documents stopped when I upgraded Scapple to 1.4.1. Typing ‘mdimport -L’ from terminal showed me that the Scapple mdimporter loaded but the Scrivener mdimporter did not. I tried to force load it with a terminal command I got from the Foxtrot forum (quite old) but no use. I uninstalled Scapple and now Scrivener mdimporter loads and indexing and search work. So the two mdimporters seem to clash in some way

Anyone else seen this issue? I am using Scrivener 3.2.3 on an Mac mini M1 (2020) Should I perhaps downgrade to an earlier Scapple?