The One Lap Of America - pretty highly tuned - car had a limp mode experience on a test track day, a couple of weeks before the One Lap actually started. They added another auxiliary oil cooler, and all was well.
That's the only track induced limp I've heard of on a 135i. The Gotlandring and the Laguna Seca launch events had these cars being flogged for days on end, with not one limp reported. If it did have an issue that anybody saw, it would have made big news.