Netbeans 12.6 is blocked on save

When I use Netbeans, I find that during backups Netbeans is blocked (I use CTRL + S on a file).

Not every file backup, but once in 10 backups. I must kill Netbeans with Task Manager and restart.

A screenshot :

Memory when I kill Netbeans (so high for 2 small java project) :

I add logs files.

I have the same issue on Netbeans 12.5, the latest version does not fix the issue. I tried to change JDK, increase memory...