I've upgraded update-manager from 1:20.04.9 to 1:20.04.10 in an up-to-date focal amd64 VM, and have verified that the issue is resolved.
I've upgraded update-manager from 1:20.04.9 to 1:20.04.10 in an up-to-date focal amd64 VM, and have verified that the issue is resolved.