TUI zero order cancelled by BUX?

Hi, it seems that my TUI zero order is cancelled by BUX… why? I had enough t funds.

I believe they cancel zero orders when the price movement is to big from the moment you set it. Not sure on the % though.
Edit: it’s 4% for sellorders and 5% for buy orders.

I had the same yesterday. But the price was just 1% lower as the zero order i placed?
How did this happen? And is it possible to execute an zero order always when the price drops. The 5% should only work for when the price extremely rises?