How accurate is AncestryDNA with Hungarian ancestry from Transylvania?

The reason why I’m asking this question is because my 2nd great grandfather’s parents were both from Hungary and I’m not receiving any Eastern European ancestry? They were both from eastern part of Hungary that is now modern Romania. I know Ancestry puts Romania as Balkans but I’m not receiving any Balkan ancestry either. My grandpa has took an Ancestry test as well. He would be considered 1/4th Hungarian but he hasn’t got a single percentage of Eastern European or Balkan ancestry. You can see me and my Grandpa’s results compared at the last pic. My conclusion is that either Ancestry is not accurate, or something happened during the family line. I just want to know if anyone else has this issue or has answers