@AmethystBlade Very interesting, and nice detective work! So... can I confirm that even with all of your Mods/CC & cache removed and the game repair per the directions earlier in this post, you had the same issue still present as @lms0226 (a shirt still on when 'tanning nude')? Or was yours the pink bra still on in the shower, etc., as in that other thread you mentioned? Or both?
Also, you mentioned 'reseting the bathing outfit'. I have not done a 'suntan nude' command... is that considered to be an outfit? It sounds like the issue in that thread was a sim remaining in a pink bra while in the shower, which to me sounds different than the issue in this thread, but is that the issue you had? According to that other thread it sounds like that bra issue was fixed in an update. Have both of you updated your game to be sure that patch was in place in your games? I look forward to your clarifications, since it seems that the workaround you have used may be different than the solution on that thread.