I too am having this issue. I'm using the most up-to-date version of Bedrock, but my tridents keep falling through or despawning when I leave the area or log out/in agian.. What I've been doing is to collect them after I'm done using them. That works, but it is annoying when I used to not have to. Not to mention that I have to break the side of the trident killer and rebuild it every time.
I too am having this issue. I'm using the most up-to-date version of Bedrock, but my tridents keep falling through or despawning when I leave the area or log out/in agian.. What I've been doing is to collect them after I'm done using them. That works, but it is annoying when I used to not have to. Not to mention that I have to break the side of the trident killer and rebuild it every time.