I may try to grab some video later, but all the 2h skills fail to fire their animation if you light attack weave them fast enough. I walked away for dinner and cannot seem to replicate the issue again after logging back in.

EDIT: Never grabbed footage, but i can confirm it happened 2 more times. I want to say it was happening with some weird interaction of dizzy cast time and medium attacks. Or it was happening with the cleave conal ability. If I left combat for a while and came back after a while, the animations would return.

Cast time skills like dizzy tend to have weird interactions after the cast if you happen to light or medium weave too quickly. Sometimes it will trigger your character to do two light/med attacks in quick succession. I dont know if this is some client/server replication issue correcting itself.

Conal skills like cleave or breath of life, etc, also have an issue at play where randomly if you are walking and spam casting, sometimes the conal cast will make your character stop moving entirely. Funny enough I found this out when someone called me a hacker for making them roll dodge backwards. What was happening was the person was running away from me spam casting breath of life. The conal skill made them stand still. Then when "standing still" the roll dodge keybind forces you to roll backwards regardless of directional input. This issue is why I still use double tap to roll dodge. (Ive been reporting this since like 2015 btw)