Happened again today.
It saved my parts that I ticked to refit, but according to the race results I was running default strategy (66L all stints hards at Brazil) when I had it preset for 54, 54, 54, 51L all hards. I saved the strategy and the parts under the same "save" clicks, so it makes no sense that it saves half of it and not the other half.
Hint: I had the double click save (where it turns green after going grey) problem, once again, so I assume this has something to do with it saving half of the action but not the other half.