Confirmed this, will check into it. Thank you for the report.
Hmm? It saves for me, both width, height, and position. I've tried it lots of times now both with my current profile and a portable profile.
I've tried removing panels, moving them around, yet I don't run into problems. I made a demo here.Seems to work okay with default UI settings, with the new UI setting that allows me to remove certain things like Scene transitions and Scenes the width resize is broken.