Oh don't worry I know all about unreal optimization issues. My previous project for the past few years as well as the students at the college have problems all the time with it. doesn't seem to matter what version of unreal either :/ we did notice that 5-5.5 has been exceptionally bad for it all. Not sure how 5.6 is, haven't tried it myself yet but the college students will be using it after summer going forward. I'd better get cracking on materials for them.