Ghosting touch! What to do?

If it happens only when plugged in replace your cable. If it happens all the time see this Apple support article—>iPhone X Display Module Replacement Program for Touch Issues - Apple Support

See this:

iPhone X Display Module Replacement Program for Touch Issues - Apple Support

Service Process

Choose one of the options below to have your iPhone X serviced. Your iPhone will be examined prior to any service to verify that it is eligible for this program.

• Find an Apple Authorized Service Provider.
• Make an appointment at an Apple Retail Store.
• Contact Apple Support to arrange mail-in service via the Apple Repair Center.