How can i open combobox by touch?

Hi Guys!

I am making umg with touch monitor.

When i clicked combobox by mouse button, combobox was opened normally.
But when i clicked combobox by touch, combobox was opened and closed when untouch immediately.

How can i open combobox by touch?

UE4 version : 4.21.2

OS : Windows 10

Hey, did you happen to find the solution to this? I am currently running into the same problem

Not sure if this will help or not, but the way I fixed this was to add a ‘tap’ to the Default Gestures Config in Project Settings>Plugins>Touch Interface:

hello, how to open ProjectSetting>plugins>Touch interface ? I didn’t find Touch Interface in plugins.