plugin bypassed

hi,i have a cubase compressor on a group channel,and i just noticed that it was switched off. i didnt swith it off.
has anyone ever came across this problem b4? it happened to me a few times.

It’s probably because that audio does not need to be compressed.

You may have accidentally automated it, I make that mistake sometimes if it’s getting late when A-B-ing in a mix.

Constrain Delay Compensation enabled?

yeah constrain delay had been enabled.does that affect it?