Update after 2.5.1.A:
Went outside yesterday, temperature was below zero, had no ghost touches. Thought it maybe got fixed. Went outside today, -5 degrees, after 10 to 15 minutes, the ghost touches appeared. Fixed it by holding it between my hand palms with light pressure.
I think I’ll send them my device but I’m not sure if they can fix it or if a new phone doesn’t have the same issue.