Hi raSak, There's an issue with this at the moment that I'm working on. However you can just drag the comments/topic back up instead of pressing back. Just drag the bar with the voting arrows etc. on it. Hope this helps.
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##Version 12.0.50
- added new setting to the theme page called "Increase Contrast". This setting will increase the amount of contrast between read and unread posts - fixed spacing of nested quotes