I updated to the latest version being on beta channel and some comments in threads look like having 125% size of letters compared to others. Idk if that's some option in settings (I've not found one) and I don't see some systematic rule of why it happens.
edit: added screenshot, first comment is of different size to the next one, changing font size settings keeps the difference
I suppose there are some OS-typical settings for basic things and the way MIUI manages them stirs the Connect's dev wrong, this app doesn't get right info or have a wprkarpund to work with it. Idk.