When playing a Trident into a armor stand in any pose will not show trident on armor stand. You can right-click or Press L2 onto the armor stand to retrieve the trident and put it back but nothing will show.

Also Its not the texture pack as i changed it before posting this feed.
The tridents also wont show in your hand in both 3rd person and 1st person perspective

Video: https://streamable.com/cquym