iOS persistant problem: Timestamps (xxxx) and assets (xxxx) maps out of sync.

Hello everyone!

I got a problem, but only with iOS. Well known: Timestamps (xxxx) and assets (xxxx) maps out of sync - repairing... repair failed.

I can only save ONE time each scene, but not twice…

A solution can be found everywhere with Google: deleting the Library folder, then restarting.
But the problem is more persistant with me… I'll explain what I've tried:

- As soon as I see the problem, I quit Unity,
- I remove my Library folder,
- I reopen my project, wait some minutes to reimport everything,
- I open a scene,
- I can modify my scene, I can save it ONE time,
- I can't save it a second time without redoing the complete process.

I've also tried by rebuilding, exiting without modification and then restarting, also tried to reinstall Unity, tried to remove a DLL file (UI?), restart Unity then re-add this DLL… Many things.

But… Nothing works

It works like a charm on my Windows PC.

Seen with 2018.3.1f1 && 2018.3.2f1

Thank you!