Wellness level 10 sim bad at yoga

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 expansions, game packs, and stuff packs do you have installed? Vampires, city living, parenthood, spa day, get together, get to work, dine out, cats and dogs, fitness stuff, backyard stuff, movie hang out, bowling night, kids room stuff, toddler stuff, perfect patio, outdoor retreat, cool kitchen stuff, laundry day, romantic garden stuff, my first pet stuff.
Steps: How can we find the bug ourselves? Have a level 10 wellness sim preform any yoga task
What happens when the bug occurs? My level 10 sims yoga performance isn't correlating with her high level skill. The sim performs yoga badly i.e faliing, shaking, stumbling. Usually level 10 wellness sims perform yoga perfectly.
What do you expect to see? My sim performing yoga at a level 10 skill
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 

‌

The other day i noticed that as my sims wellness level increased her yoga performance stayed the same. Any time she tries to perform a yoga move she fails i.e falling, shaking, collapsing from position. She is level 10 wellness so she should be executing her routine near perfectly. I was curious if she had to be in good muscular shape so i got her to me the most muscular she could possibly be and yet she is still doing badly. This is frustrating because it's not satisfying to see your well skilled sim doing badly when they are level 10.