Hey, i get the same issues. My bunq card gets most of the time denied, if i use another bank card right after, then it displays money. I tried it already at all different bank atms. It takes round about 4 attempts at different machines. Most of the time, it shows the error "Time Out". Last year everything was fine.
I talked already with the private support and he says, it might be the ATM outdated (but i used different banks and ATMs). Honestly, it was not helpful.