Another report has been submitted: 446006 – Ark crashed the plasmashell process while archiving (or ending archiving) a folder into 7z default profile format
But:
-) on outdated ark version only 21.08.3: I’m on unstable, but Arch’s stable still did not get the 21.11.80 version to request the update from (Arch Linux - Package Search);
-) with no debugging symbols also: Debug symbols on Manjaro - #5 by philm .