As for 10.5.3+git20220217a-1, it seems that Workaround 2 is not effective anymore.
On Sat, 13 Nov 2021 22:37:32 +0900 Kentaro Hayashi <ken...@xdump.org> wrote: > Package: budgie-desktop > Version: 10.5.3-4 > Severity: important > X-Debbugs-Cc: ken...@xdump.org > > > * Workaround2: Launch dconf-editor and remove Alt+Shift_L from > /com/solus-project/budgie-wm/switch-input-source property. > > Before: ['<Alt>Shift_L', '<Super>space', 'XF86Keyboard'] > After: ['<Super>space', 'XF86Keyboard']