Hi, has the arena "matching" system, if you want to call it that, been changed or something?

today I have been unable to get a single match in either ranked or training.

have had the tab open while doing other things, and have left it to wait on "searching for opponents" for hours at a time with not a single match being found.

have tried refreshing my game throughout the day, and all other areas of the game are as normal, but for some unknown reason arena is not working for me