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Even the premium users are complaining of such. It's a general problem. I hope they fix it soon

Not correct, we can put other colors besides the normal themes, but the themes are there for everyone

Oh okay, so why isn't it working?

I think the people having the issues is running old versions or have issues that are more related to their own account or node they are in... I changed mine and saved the changes on laptop and I get my dark theme on phone as well