As the plymouth maintainer seems not to have capacity to actually solve this issue, I have reverted plymouth back to the version of the TW snapshot 0411 (0.9.5+git20190908+3abfab2) This does not fix the issue, but at least gets our users back on track to not having to worry. It would be great if some could stay around and test future versions Cliff might be providing - before they hit Tumbleweed. The reverted version will be part of Snapshot 20200504