Convert InputTouch Location to World Location PROBLEM

Hi,
I found this problem in tutorials,I download this project.

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In PickupText,I found when I turn around to make PickupText out of my screen boundry,After that, I turn back,this text will disappear.Like this:

And this PickupText’s blueprint,when I break line between select to setvisibilty ,make this widget visibilty always,It works.

I did this method in my game,I need show health bar on the front of my character,It never make mistake.But when I update my project from 4.7 to 4.9,the problem appears again.

so,How can I fix this problem,Thank you,guys.

Anybody can help me :frowning:

just use 4.9 even the UE4 team says use the version you started to all the project because stuff get broken and you cant fix it