Power Allowance Only Dims Dimmers?

I just noticed all my dimmer switches once hit the power allowance time in the Smart lighting app dont really turn off just dim to the point they look off but switch is actually still on.
Is this normal? They do turn off with routines etc. Should I use Core to turn them off after certain time?
Not sure if keeping them on at a low percent is really good for long periods of time if I dont check on the phone app. and then turn off via phone or physically at switch.
Thanks in advance.