I would retest with gnome-shell on your setup. This is highly likely to be either a gnome mutter issue or a graphics driver issue rather than a budgie desktop specific issue since budgie is highly dependent on those components.
On Fri, 25 Dec 2020, 00:06 Mina Morcose Farage, <3409...@gmail.com> wrote: > Package: budgie-desktop > Version: 10.5.2-2 > Severity: minor > > hi > > i have an external monitor beside my laptop monitor when i try to change > it to extended mode or as called in budgie " Join Display " my external > monitor turn to be crumbled it's like the display has been splitted to > small boxes and overlayed over each other > > to reproduce this problem you have to make the external monitor on the > left and to be primary and try to apply the mode and to bypass this issue > you should to make it to the right > > Thank you > Mina Morcose Farage > > >