I was using opera mini 21 on my old mobile and it worked perfectly. Now I purchased new mobile containing android 10.
The issues I am facing right now:
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Auto Refresh/Reloading every time I come from another app as replying on whatsapp. This is annoying because I usually read articles and Auto Refresh/Reloading makes me unconformable. In old version 21, There is no auto reloading even I reboot my phone. 
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Data compression is not up to as older version even I choose extreme feature. I live in a country where data is very expensive. 
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I don,t understand the feature of File Transfer. What's the point. Everyone in my country uses other file sharing apps. A browser should be browser. 
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When I open more than 12 tabs, I struck/freeze. 
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Ad-blocking is not satisfying me even I disable the Adblock Plus option. 
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News features should be cut off. Because it fetches relevant news. Cutting off makes the opera mini size smaller.