I find this problem recently. I'm not sure if its always like this.
When I turn a layer into a filter, there turns out to have an annoying blue selection around the filter area. For example when I change a layer into Multiply. It shows a blue box around it like this [Multiply].
This blocks all my shortcuts because I'm now selecting the filter area. I need to press Esc or draw in a empty corner to deselect the filter.
I never hade this problem before and I don't know how I got it ( Maybe a preference setting? )
If I want a Multiply filter that is all I need I don't need to keep the selection.
Does anyone know how to get rid of this? Thank you so much if you know.