I’m not. I’m seeing a few posts about explorer crashes, unresponsive context menus or taskbar. I had errors even launching the installer (only the start11 one) till I rebooted. It’s been pretty solid till recently and I don’t change much on my windows pc as it’s only for gaming.
I don't think we are aware of any such issues. Only people insider issues having trouble with changes to the taskbar in recent insider builds which is what the latest beta build addresses. If you are on release build it would not impact it other than a fix for overlapping system tray icons in some situations.
If you were even unable to launch the installer then something very odd is going on which seems unrelated to Start11 as it would not be impacting the launch of that.