Name: Big Bill Livonia Michigan (Zone 6a) GROW ORCHIDS!!!
I have never seen that before.
I wonder if it might be due to some gene instability like you think. I would find it hard to believe it is either insect or disease related. I would just ignore them. It probably not preventable or controllable.
Taught classes on Orchids and Orchid growing and led hundreds of bird walks. Retired Wildlife Biologist.