MacBook Pro 14" 2021 M1: macOS Ventura 13.4.1 (22F82)
I try default control ^ + Space and custom command ⌘ + Space. Using only one additional source + English.
I noticed that sometimes I can't switch the layout. The problem appears only on the first press after working for a long time in one of the layouts. Karabiner-EventViewer catches this press for control and command + space cases when system skip switch of inputs.
Fixed only using settings "Use the Caps Lock key to switch to and from ABC".
I have MacBook Pro 13" 2019 Intel i5: macOS Ventura 13.4.1 with same settings and I didn't notice the same problems with him. It's hard to catch, but this problem has become quite uncomfortable in four months of using MacBook Pro 14".