MIB 3 SW update

Hello

I have a Fabia 4 with MIB 3, OE 3V0.035.816.L, but with the old SW 0306.

Carplay, or rather the phone, is often disconnected. A known thing on old SW. I would like to put the latest possible SW there. I would probably flash it via ODIS rather than via USB.

Has anyone encountered a situation where the flash did not go through and the unit was gone? Is there then any possibility of restoring the unit, for example on the table?

It's my car and the system is not exactly cheap.

Thanks!