Telegram should search for a hashtag and display chat element where you could go and after a click you should see highlighted item with slow transition effect.
But instead of just a transition effect you see a strange blue line above the text box.
Operating system: Windows 2008 R2
Version of Telegram Desktop: 1.0.9


Thanks for your report! I hope to fix this in the next version.
@john-preston Identical bug: https://github.com/telegramdesktop/tdesktop/issues/2904 - please applied fix too.
@Lazek I cannot reproduce that. What OS / interface scale do you try this in? Maybe you launched it on non retina screen and then view on retina screen or vice versa?
@john-preston Yes, confirmed in old version, already fixed (forgot update ;))
@Lazek I guess this will happen in that cases (when you switched retina to non-retina or back after launching the app), but I can't avoid it for now. In other cases it should not happen.