oops, this is a false positive due to bad coding practice. problem is inside wintz.cpp and I finally got it fixed.
https://github.com/roytam1/UXP/commit/92e1373e8c7dc28bcc715aaad0bd9558b11a7909
(EDIT: from my limited testing, it seems to be fine with AutoDST on or off, so no further change will be made about it)