Gnomes Glitch-Dancing/ Jumping around

HI! Long time Simmer here and I too, have the wiggling gnomes. 

Now, color me curious but we know that the next expansion has Gnomish powers, maybe there are super excited for fairies too? I have no mods, no Non Sims DLC or anything that would cause wackiness to my game so my only theory is Natures Calling is ... calling to them ... But that's just my 2 simolians! <3