Strange glitch - MWS flower accessory?

I was playing a restaurant, and suddenly a typical glitch appeared where a huuuuuuge graphical shape covered a quarter of that lot. I moved about a little, meaning it probably was related to a sim on the lot. I had played a while without any such thing, so I assumed it would be one of the guests rather than the staff. However, I did not manage to track down what exact sim because the shape was so big and I did not know what end was connected.

It disappeared. But later it returned. I noticed a guest who I did suspect also earlier, and checked him in CAS. I expected he wore a CC ring or something, but nope, I found no CC on him. But he wore the flower accessory thing on his jacket, so now I wonder if anyone else had this happen? He also wore the BG wedding ring, which I often use and never had any problem with. Could the flower acc. and that ring conflict somehow?

The graphical field had 3-4 colors, and although I did not recall all colors of that flower acc. the shape did have calm shades of natural colors, so it could have been the lower part of the flower acc. But if so, I'd assume it was at least noticed by someone long ago. I played the pack only for a couple weeks.

Sorry I forgot to take a screenshot. I'll add one if it happens again.