Weird issue with sprite selection

Hi everyone

I'm facing a very strange issue with sprites : whenever i click on an object containing a sprite component or click on a sprite in the asset database, unity immediately crash.

I started to dig the issue and after a while i decided to reimport all my sprite assets, it crashed ... what the hell ?

Then, and that's the interesting part, i found a weird trick to avoid the issue : if there is a PNG of my database, whatever this PNG is (!!!), specified in the file "FailedAssetImports.txt", everything goes back to normal with no crash. And by the way I encounter no issues importing PNGs as sprites since the start of my project.

So ok it works now, but i still have to keep a random PNG of my database in excluded imports to keep it ok. Not cool and totally what the fuck :(

My question is : does anyone already encountered this kind of issue ?

There is probably something wrong in my scripts because it's only since a few days. I have custom editors but nothing that deals with sprites by the way. The other strange fact is that my friend i'm working with doesn't have the issue even though he has the exact same project and unity version ...

Any clue would be awesome.

Thank guys !