I've had this too. After a short while I have no idea what's on cooldown because I can't see any of my cooldowns. It'll just show things like Fire Blast has 0:00 left and Ice Block has 2:22 left (when it's actually up and ready to use). Cooldowns just seem to not go away or freeze mid cooldown.
Also having this problem. Does anyone know what the latest version befor the rewrite was? From what I recall it had all the features that the current release does (including actually working). Would be a good temporary solution until the bugs get ironed out, as the mod really isn't usable in its current state.