Hi, I have a bugfix that will likely fix #371478, #371263, and #371234. Not sure how to submit it, the kde docs suggest Phabricator or Review Board which I'm not familiar with, but anyway, it suggests asking the current project people. Is that what you prefer? I was hoping to find the time to contribute more.

In the meantime I have put it as a proposed patch on #371234.

Did you get an answer to your question? Else I would suggest you ask on the mailing list of the project.