Erik Bugs really have to be solved by bunq themselves, but maybe someone here knows a workaround for connecting your accounts. You could try other devices of course, i.e. iOS instead Android or vice-versa depending on what you use right now.
If you just want to send payments via Wise, of course there's no need to connect it with bunq really. You could also just use the Wise app or website stand-alone and get at least the same rates, if you choose the cheapest transfer option. Then it's just not inter-connected as well and maybe a bit less convenient.