Similar to maicololiveira who posted 11/13/2020, I turned disabled Handoff in macOS System Preferences --> General, logged out, and shut down my Mac. I then also disabled Handoff on my iPhone in Settings --> General --> AirPlay & Handoff.
Then restarted the Mac, logged in, enabled Handoff, and then reenabled it on my iPhone. That solved it for me.
Best of luck!!
Stokes83
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