Ping on frankfurt is just showing as ???, but my internet is perfectly fine

So for some reason my ping is showing as ??? or ping failed on most of the servers except for bahrain (im nearest to frankfurt so that shouldnt be happening). My friend went in a custom game today to try to force my account to get on frankfurt servers and my ping said it was 27, when i left the custom game it just said i had a normal ping now, but the moment i restarted the game it is back to the same thing again. Will I have to keep joining custom games just to be able to play? Because I cant do that alone and will have to make someone get on just so I could switch to frankfurt servers