I've been noticing that I will occasionally jump out of JetBrains and when I come back, code sections I had collapsed are suddenly expanded without my having done anything to cause it.
Aside from that, I would like to be able to define items to have collapsed by default when I open a file, or restart the IDE.
Would it be possible for the custom region folding to support an attribute that would define whether a region is collapsed or expanded when the file is loaded?