Why is Cloud Build SO SLOW for WebGL?

I've been using Cloud Build for a couple years, for iOS and Android builds. The typical build time on those was anywhere from 20 to 30 minutes (plus cool-down) for iOS and 10 to 12 minutes for Android. And anywhere from 10 to 20 minutes for WebGL of a simple project.

Now I decided to use it for a WebGL more complex build and am surprised to see 2 hour build times. I can do it faster locally, but then my machine is "occupied" compiling... The whole point of Cloud Build is to offload the task and also have a handy place to preview the builds to other people.

Can someone from Unity take a look at the log maybe? I found something weird were I was looking at the in-progress log and it would say that it was "Finished" highlighted in green. But then back to the build stats it still said it was in progress. After a page reload, still in progress. So then I check the log again and boom, it looked like it had started over?!

Thanks.