[BY DESIGN] Back float is considered exercise

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.58.63.1010 (64 bit)
What expansions, game packs, and stuff packs do you have installed? all DLC
Steps: How can we find the bug ourselves? Well, in my case I have a sim with a pulled muscle who just wants to chill (back float) in the pool.
What happens when the bug occurs? See attached image. Back float is greyed out and the tooltip tells me my sim isn't allowed to exercise with a pulled muscle.
What do you expect to see? I expect my sim to be allowed to relax by floating in the pool, and for back float to not be considered exercise (I don't see how it possibly can be).
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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On a sidenote, this girl is a vampire, but that's not supposed to make a difference for back float anymore.

EDIT: I made her two friends work out till they pulled a muscle too, and they get the same message.