I never had any problems with auto save but the drawback is it overwrites itself after so many saves.
I recommend you do a save a copy just before closing down preferably to another drive and don’t overwrite the old one.
The flickering bar is due to Aero in Windows.
Set it to classic view.
If i am not misstake your ‘avi’ is mpeg4.
To be sure run it through GSpot. https://www.headbands.com/gspot/
If so you probably better choose the XDCam EX preset.