We are all on the same mission (running UNA CMS stable and smoothly), with different pre-conditions (our different server settings), but with the help of the same supporting team. Btw, are you self-hosting?
Okay, that is understandable. I can see how some things just won't work correctly for everyone. I am on an UNA hosting subscription. My site runs like clockwork 100% of the time. I have had issues with apps I purchased, but the problems, bugs or adjustments have been quickly corrected, fixed or made. Getting a stable and reliable payment partner up and running is my biggest and most important concern. Without it, I can't make money with my site and members can't make money being on my site.