I am unable to reproduce this issue using TS 2021 in SeqEdit, LV 20.0 and LV-build executable (LV 20.0) . I have also verified that the code in the TestStand engine has not changed to impact behavior since TS 4.0.
Couple of questions:
What version of TestStand and LabVIEW are you using? Are you able to reproduce this issue on multiple machines?