why does KDevelop auto-close deleted files?

[Matthew Woehlke]

So I'm working on a project, and realize I need to do some git branch
maintenance. I switch branches, do some stuff, switch back... and half
of the files I had open in KDevelop are gone.

Automatic reloading is bad enough (it drops the undo buffer, which is a
form of data loss), but this really is a bit much. Can this be turned
off or reverted? (Or is this a katepart issue?)

-- 
Matthew