Installer issues with LVM

This is being logged when I press OK button in “Create Volume Group” dialog:

21:22:01 [2]: QXcbConnection: XCB error: 3 (BadWindow), sequence: 12309, resource id: 14750625, major code: 40 (TranslateCoords), minor code: 0
/usr/bin/calamares_polkit: line 3: 12450 Segmentation fault      sudo -E /usr/bin/calamares "$@"

Should I open a bug report somewhere about it? How to proceed when finding issues like this in Manjaro? Is posting in the dev section of the forums still the prefererred way as posted here: Where do I report bugs - #5 by codesardine

I seem to be not allowed to create a new thread in the corresponding section “Calamares”: Calamares - Manjaro Linux Forum

Any hints on how to proceed?