I have trouble reproducing this one .. do you know of a map or area where it happens every time?
or do you perhaps have a save file? 🤔
I tested this on E1M1 in the room where you get the invisibility powerup for the first time. Also on E1M2 where you get the invisibility powerup after a slam dunk with the basketball hoop and then you eventually get five dynamite. Seems to happen in every level. The powerup is bugged with the dynamite, but thankfully, the other weapons are not affected.