X11 streamed UI consumes huge network bandwidth

I am developing to migrate applications from Qt 4.x to Qt 5.x using QtCreatort,
The program built with QtCreator 5.x on the CentOS 7 server is remotely accessed and executed using Xming.
The operation is like displaying a point with a mouse click, but the display is very slow, the network load quickly reaches about 100M.
When executing the same program built with QtCreator 4.x, the network load consumes only tens of KB.

This problem was reported at QTBUG - 56851 https://bugreports.qt.io/browse/QTBUG - 56851,
The problem is not solved even with the latest QtCreator 5.10.1.
QtCreator 4.x has no such problem.

I'd like you to solve this problem as soon as possible