Finally managed to complete Aachen Turnaround with a gold medal, but I noticed that after releasing PZB, the blue 85 on the MFD would continue to flash, even though I was no longer restricted by PZB.
I can second this. It occurs using the Talent 2 on all routes as well as the above mentioned scenario. The PZB symbol on the HUD stays solid at 85 and allows the 45km/h limit to be exceeded once the release lever is pulled. But the central MFD incorrectly keeps blinking.