I play on 1.18 through better minecraft modpack and when I first crafted the rocky roller chestplate it was working perfectly, but since a while ago it has stopped working, I've tried almost everything, exiting to main menu, quitting game, Opening LAN world and even restarting computer.

Take it off, leave the world, then put it back on, the problem seems to be if you die while wearing it, it just doesn't work until you relog, but it also just doesn't work randomly to a few people so i'm not sure