That's because there are too many bitassets, I consider it as a bug...
BTW, yvg1900 is a talent guy, I used his mining software for PTS. I think he is very good at windows programming.
As you can see, the windows version wallet is still not good, do you consider joining the dev team to improve it? If so, I will be the first to support you to be a 100% payrate delegate.