Clicking inventory slot while open stops character from moving!

Hello all!

 I appear to be having a small problem with my inventory slot, when I open my inventory and click on an item while moving, my character stops all of the sudden until I have to press a key again to start moving again (like the W key for example).  

I have tried adding a “Set Input Mode Game Only” Node in between the “Is Button Down [Left Mouse Button]” branch, but it does not work. This is a huge disadvantage when being chased by an enemy and you have to use a healing item from the inventory.

Below is my inventory and blueprint of my “On Mouse Button Down” function.

Thank you to anyone who wants to help!! ^^

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