bypassin inserts/sends in mixer

Hi everybody,
suddendly the bypass inserts/send buttons in the mixer panel stopped working, and the relative key command (alt/option+click) stopped too…
Can anyone help me?
Thank you,
arfo

Hi,

Try to Cubase Safe Start Mode. If it works in this mode, reset Cubase preferences, please.

Hi Martin,
it seems to be a problem only in some projects but I’ll try your advice…
Thank you ,

arfo