Opening Nuendo 10.2 session that had delay constraint on loads as if the constraint is still on (the icon is orange ie it is active) - but sonically it is processing using all the heavy CPU dsp.
I click it to turn it off (icon grey) as it launched with it on (orange) - there is no change in sound (cpu intensive plugins are all running)
I click it again so it is active (orange) - the sound now changes as expected.