I have also noticed that logmein-hamachi_2.1.0.203-1_armhf doesn't work correctly on Raspbian Buster.
The connection drops out and comes back up sporadically (because two interfaces have the same IP?).
After reverting to Raspian Strech everything works as it should.
I wonder if the problem is caused by an incompatibility in Hamachi or a bug in Raspbian Buster?