This is a minor problem but it is annoying sometimes. When I choose a monospace font in the editor (Source Code Pro, DejaVu Sans Mono, Fira Code, etc.), and my cursor moves under a parenthesis or bracket (characters that are bolded by the editor for example to show the parenthesis pair and such, when cursor moves under them) looks like the character changes its width and the line moves a bit.
Cannot reproduce with Consolas on Win (I don't have the mentioned fonts installed).
Which OS? Which version of TXS and Qt?
I just noticed that it happens only on my Win 7 machine. On Win 10 it is ok.