Hi Thamrongchai
welcome to the Apple (user-to-user) Community!
Re: "Issues with VoiceOver Cursor Tracking on Mac while Hovering over Images : when the pointer hovers over images, the VoiceOver cursor tends to jump around erratically, causing significant usability issues"
Thank you for posting to the community about the issues you are experiencing, and for your video.
Commiserations on the usability issues.
.
Re: "Could you please help me troubleshoot this issue?"
If you do not receive the help you need from the community:
You may want to send feedback to Apple:
To provide feedback about an accessibility feature on an Apple product,
email the Accessibility team: accessibility@apple.com.
They may not reply, yet your feedback will reach those who can make changes (eg: in a future update).
For support with an accessibility feature:
You may want to contact Apple's Accessibility Support Team:
How to contact Apple for accessibility support - Apple Support
or
Apple's Accessibility Support Website
(NB: You can "Get Support" (online chat / phone / email etc.) from the link at the bottom of their website:)
Accessibility Support - Official Apple Support
All the best :-)