Yes, this is always hard. Everyone has a lot on their plate, so you need to make a lot of effort to get people involved. You need to make the problem interesting and simple enough (so that when someone reads your post on a smartphone while waiting for a bus would start thinking on it), make the questions very focused, trying to keep it short, but still provide enough details, etc. You may still end up being unlucky and not to get too much useful help.
You can also try again in a few weeks, maybe post a new topic, present the problem again a bit differently, with a small reproducible example, maybe someone will bite. I’ll not respond to that topic and we’ll see if that will encourage others to step in.
If things are urgent or mission-critical then you can always contract Kitware (we bought small support packages occasionally when got stuck and things worked out OK) or someone else to investigate and fix some problems for you. Or just wait for someone else come across the issue and figure out a solution.