At home, I use VST Live 2 with a NI Kontrol S88 MK3 keyboard.
I observed an unexpected behavior (at least for me …) when using the NI Komplete Kontrol VST plugin in two songs.
Both songs have a layer with a single instance of Komplete Kontrol, different instruments / sound in each of the songs.
When I switch between songs, the UI on the Komplete Kontrol MK3 keyboard does not switch to the UI for the correct Komplete Kontrol VST instance, it always shows the UI for the VST in the last song in the project, even when I open the VST UI for the first song.
Not sure if this is something under control of VST Live, but in Cubase 14 the correct instance of the Komplete Kontrol VST is shown in the hardware UI when I switch between tracks with multiple Komplete Kontrol VST instances.