the workaround is probably to have all mods agree on a format where you have a file, which contains a list of all files in this folder, which is read instead of using FindFile, which then needs to be updated every time a file is created or deleted. Not great and doesn't fix the problem and can easily cause problems if not updated properly, but would work if there is no other way, but this should definitely be fixed in my opinion.

I also cannot understand how we only got his one experimental update so far and not a single hotfix for the most important bugs preventing us from properly testing our mods...

Do you run Community Framework? It definitely has some problems with Motorbikes and after I removed it in my tests, everything was fine again

And why not use a Json config instead? 99% of the usecases were for obfuscation and I would not be surprised if the devs decide to not add it back. To me it looks like the Engine Upgrade, which was done just did not support it anymore