Hi everyone π
Thank you for being so patient! This has been hard to tackle because when reproducing we come up with nothing in particular that can be the root cause, I am afraid. The developers are working on something that might fix the issue and we'll let you know once there's more information about it.
For the time being, what you can do is use the workaround provided before - lock your phone without keeping the bunq app open. In addition, if you're using Tap&Pay, you can also try switching to Google Pay for a few weeks to see if there's a difference. I hope this helps!
For now I wish you a nice rest of your day π