Hi everyone,
I just wanted to report that this is happening to me as well - about 8 times in the last 24 hours of working on a design for a client.... its pretty frustrating. This never happened to me before X15 and to answer a previous comment further up the thread, i do not have any box or bay windows in this drawing. I hope it gets resolved quickly as I don't have the time to keep re-doing it.
-aida