Kyrne I have taken some time to figure out what is actually happening and why I'm having issues loading opera mini and UC mini on mobile. I made some discoveries.
I found out that when i turn debug mode "off". Voila! It starts working fine.
But then something else happens. Turning debug mode off slows down my website considerably and it takes much longer time for page to load especially when i clear my browser cache. I have performed a page speed test with debug on and off using gtmetrix.com and the difference is noticeable.
Now my question is?
1. What should i set the debug mode to: TRUE or FALSE?
2. On your setting and flarum is debug turned off?