Car designs going missing

I keep having this issue: If I change the design of my car to something other than what I got when first buying the car, and enter an event that uses a different car, the design is reset to the original design when completing that event. Also, I am no longer able to access the design from the recommended section and it is removed from my design history. I’ve been pretty bummed about this as I’m losing cool designs and annoyed that I keep having to go to the garage to repaint the car. Is there a fix for this issue?