I have just noticed this when running through a campaign stage. She is the fastest in my team at 154, with bellower coming in next at 146.

First wave is fine with warmaiden going first, but when they go to the next wave bellower goes first.

She is losing speed or turn meter for some reason after doing her A3. It's possible it happens in all content, but in campaign farming it's very noticeable

Edit: problem solved