I (my thralls) mostly use short swords, Katanas, long swords and Axes. I sometimes use maces. I don’t recall this problem with axes, maces or bigger. IIRC even Amir’s Tulwar (no mods) went invisible and pretty sure it happened at least once with (iron) Katanas. But mostly with short swords.
I have been mostly using the perfected weapons (when avail.) and upgrading those as each Smithing Journey is completed. When weapon upgrades unlock I use those. A newly converted thrall may use their default weapon until I craft a replacement. I will also replace older weapons with newer ones when I get a crafter.
I tolerate things like this and don’t take notes. Then at some point after 100 hrs or more and seeing this bug repeatedly, I decide to post about it with foggy memories. I was surprised to find no other posts. So it’s probably just me. I have only seen this bug on thralls.