According to comment#25, the SRU of https://bugs.launchpad.net/ubuntu/+source/efivar/+bug/1892792 could fixed this issue and it already in focal-updates.
According to comment#25, the SRU of https:/ /bugs.launchpad .net/ubuntu/ +source/ efivar/ +bug/1892792 could fixed this issue and it already in focal-updates.