Currently, the spark is now on wifi only, no USB to the pi. Pi is being powered by a 1 amp USB wall brick. Spark is powered by its own power jack via different wall brick.
Before when the problem started everything as as above, but I had the spark connected to the pi via USB.
To overview a bit. I had updated to the newest release plus firmware and had no issue. Then suddenly I could not connect to the ui, the page would never load, just a white screen. I was able to putty to the pi. Both devices showed up on my router wifi. I tried restarting the pi and the spark by unplugging both from power then powering back on at the same time. No progress. Thinking it might be a problem with rasbian stretch, I flashed the card to newest buster lite release and fresh installed brewblox. This did not fix the issue until I ran an update command and then it worked again for a couple hours. It reverted back to not working so I tried a different sd card with a fresh install, which did not work. From here, I disconnected the pi from the spark and rebooted the pi. I was able to get to the web ui, but did not have the spark connected. I plugged the spark back into the pi and I could no longer reach the web ui. This is when I was trying to use the discover command and could not find anything. So I plugged spark back into the pi and re flashed it and reran wifi command. From here, I was not sure it was working so I unplugged the spark again from the pi. And I think that is around the time when the web ui loaded again.
I cannot recall all of the details, but I do remember that I ran the editor command in putty and that was the same time that the web ui loaded back, not sure if that was just a coincidence of timing or it triggered something.
Edit: there seems to be someone else who posted a different issue in this thread, not sure what is relevant.