Traffic sign recognition

Moin, have problems with traffic drawing detection. Concrete example: A 72 on Sunday. Speed limit 120 km/h. This is also displayed correctly. Then limit to 80 km/h. This is also shown in the display about 1 km and then changes again to 120 km/h without there being a traffic sign for it or otherwise being lifted. If my speed camera app had not been, I would have driven directly in and my flap would have been gone. It was still only 80 allowed. Only after 3 km is the Second example: A 13. Allowed is free ride and in my ad stands over endless kilometers limit to 120 km/h. Reset button I have felt 100 times pressed, without success. My Kia dealer is also a bit perplexed. Does anyone still have an idea? I lose confidence….