People, this was discussed with the developers and, right now, they need the support package to reproduce the error.

Please follow these steps:
First enable debug logging: GUI > Settings > General > Maintenance > Enable debug logging
Then try to reproduce the error.
And then create a support package and submit it (guide here: https://www.avast.com/en-us/faq.php?article=AVKB33) and post here the ID of the created package so we can find it.