I noticed the exact same thing last week when I tried to follow a live cup game and Safari kept dropping my active session in the background. I actually came across an official download for the Onjabet app while I was looking for information, basically, it’s a dedicated mobile version that runs much smoother because it doesn't rely on your heavy mobile browser engine. I haven’t done a deep dive into all its background data settings myself, but I think it might be worth checking out while you’re still troubleshooting your setup, just to see what options are available.