Safari 14.0.1 Reoccurring "This webpage was reloaded because…" error.

I have the exact same problem, even with Safari 14.0.2 (16610.3.7.1.9).

Interesting thing that I cannot trigger this arrow on my work MacBook Pro (same Safari version). I'd be happy if I could disable it, but I don't know how. Others are also wondering: https://discussions.apple.com/thread/252192557.

Inspecting the Console, the official name of this feature the arrow is triggering seems to be 'Context Menu', but this knowledge isn't helping me to more relevant search results.

This is the crash in Console:

fault timestamp Safari Received an invalid message 'WebPageProxy_ShowContextMenu' from the WebContent process.

Tried cache reset, disabling extensions, JavaScript, everything else in Develop menu, reseting Safari with Clean My Mac, actually reinstalling Big Sur with a clean install, removing cookies, etc. The only thing I haven't done is removing the history hoping there is another way to fix this.

Any idea is greatly appreciated.

Exactly what's happening to me. I've tried to turn off all the safari extensions and services in Services Preferences but that didn't help. The grey box do disappear when I log in with Guest user though. So confused.