Will try it with 4.4.7 which have not be ready now, according to https://bugzilla.redhat.com/show_bug.cgi?id=1832986#c27
I'm still seeing the same issue with ARO v4 (4.3.18) upgrading to 4.4.6 on 2 occations, I'll try with 4.4.7 once it's available.
Created attachment 1695406 [details] etcd-operator-log
The bug fix landed 4.4.7
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:2445
*** Bug 1838630 has been marked as a duplicate of this bug. ***