When in create a sim if you choose a wing after already selecting a wing and use the undo tool the pattern of the wing will carry through the undo. For example the pattern on the wings that look like flowers can transfer onto the large butterfly wings without me painting them. Or the moon wings onto the dragonfly like wings. If you undo another time you will return to the correct wing pattern so this may be a feature I missed however it does not seem like it as I noticed it after the most recent update.
I have not tested this on PC. I am currently playing on xbox. I do not use cc or mods.
I have tested reloading the game and that does not rid me of the bug.
This is not the most pressing issue and does not effect gameplay or immersion horribly. However I felt it should be noted
Edit By Crinrict: Added Tag to Title, Adjusted Title