Don't suppose you know any way to narrow down which one could be the culprit ? I have around 300+ objects :/
I once used a rule of thumb I.e deleted 1/2 and saw which one caused the problem, after a few repetitive steps like that I was down to a handful of objects on which I could click an move to see what they were.
Another way is to select all Objects then > Edit mode (Vertex)>“Select”- drop down menu> Select by trait> Select loose geometry, with all that selected, you can then inspect what that is.