Try to use contact cleaning fluid, or isopropylic alcohol to clean the FP5 connector.
Shut down and battery out.
Put some fluid on FP5 USB-C connector, little amount just enough to wet contacts (use a pencil), then use a new USB-C male/male cable to perform connection/deconnection multiple times in a row, then put some fluid again with pencil, and then dry it with cleaning air.
Do this 1 to three times and then test connecting again to a computer.
If you use protection case, beware that some have bad cutting around USB-C connector and prevent full connection, which will not be a problem at first, but once connector is getting old and dirty, will prevent good connection then also.
