http://larian.com/forums/ubbthreads.php?ubb=showflat&Main=81518&Number=643712#Post643712
As you can see here the bug was reported 03/15/18. I'm pretty sure it was caused by the patch released right before that date, because I never saw the problem before the patch.

I'm sorry, but I have to say that I'm quite a bit disappointed that this wasn't corrected in the latest patch, a patch with a lot of bug fixes. I do hope you can look at it and fix it really soon.