MabiPro: The Authentic Old-School Mabinogi Experience

There's been a recurring bug that seems to hit and render me stationary, which basically means I'm out of a dungeon whenever it happens.

When loading skills, sometimes, when the skill loading is complete, I simply can't move any more, and generally can't use and skills to target anything. I can still use the in-game chats, drop items, summon pets, and can sometimes still trade with other players, but can't move, mount or request a mount (I can click "request mount", but the other player doesn't receive the request).

I'd really appreciate any help or possible explanations.

I don't use Astralworld, but I actually only use magic skills (this has happened most often with fusion bolt).