I was playing a public Meltdown match, and after a respawn my gear that I had already activated appeared to be deactivated again. I had enough Shards, so the info at the bottom right popped up. But when I tried activating the gear piece in question, it didn’t work. I was already wondering why I hadn’t activated it earlier, but that was when I realized it was a bug.
Later one a similar thing ocurred, where the info at the bottom right popped up, but upon entering the gear menu everything seemed activated properly.
I think it’s a visual bug, but I’m not sure.
EDIT: I think it happens when you die while channeling a spell. Was able to reproduce the bug by dying while casting Mansformation/Bindleblast/Paradigm Shift