This is curious, especially as it would be a game breaking bug.
I downloaded V0.5a Mac and win from this site, played it from scratch until I could execute Tower Duties and could not find anything wrong. It can not reproduce it in either OS release.
Can you send me a screengrab of your ingame debug info screen (you get it when clicking in the top left corner while in navigation mode). Looks like this:
Also, can you briefly describe whether whether issue is 100% reproducable and how (e.g. start new game, get up in morning, do bath task and at 9:00 execute "Tower Duties" command....)
Version 0.5a has been download a zillion times since release and I would get (rightly so) flooded with bug reports if such an obvious error was in the build.
Anyway, thanks in advance for your cooperation. If it leads to finding the issue you'll get an access link for the latest version (0.5.1 patreon) as "bug reward". ;)
y.v.