Conditions These are the conditions to see the issue: In the Prerences in Interface, in Interface, in Editor, Font: `Monospace Regular` size 27 Color scheme: Gedit. gedit.conf: brace_good- and brace_bad-values like default-values of gedit.conf.
Issue In some zoom sizes (for example three times less than the maximum zoom or one time less than when the zoom is 0%) I can see sometimes a change of the closing curly bracket and also the closing box bracket when moving with the arrow-keys. With other brackets, like for example round brackets or or angle brackets or the opening curly bracket, I don't see a change when changing the zoom size. What I mean with "sometimes a change": It is not the highlighting effect, but for example I can see that the vertical line of the closing box bracket becomes just a little bit smaller than before.
Test This is how the test goes: Set the zoom to maximum. Then move with the left/right-arrow-keys three or four times through the closing box bracket to see if there is not a very small change. If not, then zoom out one time, and test again, ...