I run several beta watch apps and I am finding it very hard to get my watch to load the apps. am I the only one. The beta apps never auto load and I have to flip the load switch in TestFlight back and forth to finally get them to load.
You're not the only one. It's a widespread issue with TestFlight and Watch apps and it started as of iOS 13.0/watchOS 6.0. Unfortunately, Apple still hasn't fixed it.
As you've discovered, the fix is to toggle the Watch app in TestFlight to uninstall/reinstall. (when I tried to delete one directly from the Watch I ended up with a broken icon and the app not actually being removed)
This year's iOS/watchOS releases have been rough 😬