WebEngineView - Wacom pen not works

Hi,
Wacom tablet pen click not works in WebEngineView, but touch works correctly.
Hover event seems works ok too.

Simple run simplebrowser example with wacom tablet connected and try operate with pen.

TIP: I found that clicking left mouse or touch event outside the application and restoring it with a click of a wacom pen WebEngineView starts operate pen click correctly for some time.