Guardian rank perk bugs?

I’ve been farming Slaughter Shaft TVHM m3 and sometimes I’ll notice after a while my “topped off” perk isn’t working anymore. Not sure if it’s after I’ve spent a new guardian point or after a respawn but my cool down becomes much slower and I can only assume my perk isn’t active. There is also times I don’t see my damage buff stacks showing under my level bars. Don’t know if I’m losing those buffs though. Anyone else experiencing these bugs?