I have given your map a brief run in an ECU here and the limiting works as expected. We havent had any reports of a limiter problem for a long time so if there were one it could only be related to something unique to your set up. With so many variables involved it will be nearly impossible to reproduce without a log showing at least some of the conditions that were present at the time to narrow it down.
Unfortunately I dont have much advice to offer except to suggest you set up ECU logging to always work in the background so you can get some insight if there ever is unexpected behaviour in the future.
