Eli Zaretskii wrote:
> What happens in the "good" configuration if you decrease or increase
> the frame height there by 1 pixel?

It works as expected in both cases.

-- 
 ,= ,-_-. =.  Bruno Félix Rezende Ribeiro (oitofelix) [0x28D618AF]
((_/)o o(\_)) There is no system but GNU;
 `-'(. .)`-'  GNU Linux-Libre is one of its official kernels;
     \_/      All software must be free as in freedom;