Quick Select Black boxes still selectable when library is closed.

Describe the Bug

I have populated the quick build black boxes at the bottom of the screen. While moving blocks that have been placed around the build I am still able to click the black boxes despite them not being visible when the build library is closed.

My cursor appears to be well off screen not specifically over the box in question but in line with it further off screen. 

Screenshots/Videos/Twitch Clips

https://www.twitch.tv/videos/1414732340

Additional Context

I thought I was going mad when this was happening, I dont use the quick box a lot so I am not sure when this may have started. So glad I had it happen on stream so I could grab it.

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