Trying to process an audio event using the Direct Offline Processing window

Hi! Can anyone think of a reason why nothing happens to an audio event when Apply is pushed? I mean, there’s a “✓” symbol present in the “Status” column on the left, so…
Just trying to modify an audio event using the Frequency 2 plug-in. I’m going mad… Please help!

I’ve had that kind of thing happen on occasion… not sure what (or if) I did something ‘wrong’. I close the process and reopen and it seems to work.