How long can I expect iOS builds to take to complete right now?

I remember before, it took less than an hour usually for my builds to complete. However, my current build has stayed on queued status for considerably longer. I know recently there has been issues with the build services so I am wondering if anyone knows how long I can expect my iOS build to take at this time. Thank you.

By the way, is there a certain runtime version I should or should not use?

Build [4.7.37] is working for me (Web App and Android version)