No, unfortunately there is no bug ticket wrote up for this issue yet as we didn't make much progress on narrowing down all the possible causes in the Slack discussion I had with our QA/Testing Manager about this. i.e. I was only able to duplicate the issue by deleting a popup, not by importing a popup like you described. I just set a reminder for this in Slack and will try and do more detailed testing on this next week and if I get something wrote up for this I will update this forum thread with that information once I have it.
Would it be possible for you to zip/compress and send us one of your multi-panel HUD profiles and an extra popup or two that you believe I might be able to use to duplicate these issues in a
support ticket for my testing? p.s. Please make sure you include a link to this thread and your forum user name.