I can see the same happening with this issue. Seems the Insider Team likes to break things without repairing them. We will let the production team take care of this, lol.
I'm all about constructive feedback, thank you for sharing. I'll share a couple thoughts.
We don't "let the production team take care of it". There isn't a "production team". The same folks hard at work developing the future of windows are the same folks tackling bugs that exist in current releases. It's easy to read your frustration through your use of the word "excuse". When you hit a bug that takes a while to get fixed, I can understand how your perception was attained.
The premise of priorities however is 100% accurate. Whether working through the ideation and design of a feature, the coding of such, or through the validation and bugfix process leading to better performance and improved user experience, prioritization is absolutely a constant consideration. It always will be.