Congratulations on your new iPhone X! I see you've been noticing an issue when you're charging your iPhone X wirelessly. It appears to disconnect and reconnect several times while it's on the mat. I'm happy to help.
How to wirelessly charge your iPhone X, iPhone 8, or iPhone 8 Plus -- Review the information in this support article. Especially under the "Learn more" section.
If your iPhone, iPad, or iPod touch won‘t charge -- If your iPhone X charges slowly or stops charging altogether, follow the steps here.
Let me know how that goes.