Blasphemous 2 Consummate Collector Bug

This achievement popped maybe 2 or 3 hours into my playthrough, after 100%ing the save I went into SAM to uncheck it before going to NG+ to do it for real and when I loaded my save it just instantly popped again. I think I got it originally after picking up “The Purified One” in Aqueduct of the Costales. I don’t know what caused it for sure, just want to make sure it’s a known thing.