I would try cleaning procedure of connector anyway.

The alert go away on its own, when the connector issue is not present anymore.

However it is strongly suspected that the same mechanism is active inside the phone, so it screen is broken

or the sealing on the phone is not working anymore - it could be moisture inside the phone that cause the issue.

If this happens, I would leave phone on a heat source (radiator etc.) to dry out , at about 30-40 DEG C.

If someone have more info or experience on this topic, please leave in the comments :o)

Thanks, I found it most usefull :o)