Synaptics touchpad strangly send left Ctrl+left Shift+tab 5 times, when two finger swipe down

[ptkr]

 When I touch the touchpad wth 2 fingers and swipe down, e.g. in chrome, the tabs will go to not the another tab, but the 5th tab from it!!

Whence I use it from the start, it never worked well.

I use Autohotkey listenser and detect these infomation:

A2 01D a d 4.73 LControl
A0 02A a d 0.00 LShift
09 00F a d 0.05 Tab
09 00F a u 0.00 Tab
A0 02A a u 0.00 LShift
A2 01D a u 0.00 LControl
A2 01D a d 0.02 LControl
A0 02A a d 0.00 LShift
09 00F a d 0.06 Tab
09 00F a u 0.00 Tab
A0 02A a u 0.00 LShift
A2 01D a u 0.00 LControl
A2 01D a d 0.02 LControl
A0 02A a d 0.00 LShift
09 00F a d 0.05 Tab
09 00F a u 0.00 Tab
A0 02A a u 0.00 LShift
A2 01D a u 0.00 LControl
A2 01D a d 0.05 LControl
A0 02A a d 0.00 LShift
09 00F a d 0.05 Tab
09 00F a u 0.00 Tab
A0 02A a u 0.00 LShift
A2 01D a u 0.00 LControl

SO MANY KEYS BEEN SENT, with only one swipe??? An unbelievable terrible disaster for hp product!!

However, when I turn off "Drag two fingers to scroll option" in windows 10's touchpad control panel, keys are:

A2 01D a d 0.75 LControl
A2 01D a u 0.20 LControl

Unable to use 2 fingers gesture, so what's the problem??

And Ireally need a solution!

[y2kim]

download and run HP Image Assistant to check update

https://support.hp.com/cn-zh/document/c06196778

https://ftp.hp.com/pub/caps-softpaq/cmit/imagepal/ref/platformList.html