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Yes you should submit a ticket with a step by step explanation of what you do to cause that to occur. That's the only way it will be fixed.

Well It never hangs for me at all and I am using it every day. So rather than me try and guess what you are doing you need to provide a reproducible sequence that causes that to happen.

Lianja is...

If that ever occurs you need to try and identify the steps to reproduce that behavior and submit a ticket so it can be investigated and fixed,

I do not see why you need to restore from a backup as...