For Sale lightly used Gremsy T3V3. Comes with everything shown in the images including a spare Hyper Quick Release and an M600 Pro mounting plate. Shipped CONUS only. $1000 USD plus shipping from Tampa, Florida.
This may be a long shot and you will need a Panasonic body to accomplish this but you can try to update the firmware on the lens.
https://cs.olympus-imaging.jp/en/support/imsg/digicamera/download/software/fourthirds_olylens.cfm
The mount that the camera mounts to (Vibration Isolation mount) will most likely need to be replaced. I have had the same issue and the vibration isolation mount was the issue.
In addition to what @jpalamaro said, consider the fact of a tedious, time consuming and data rich work flow of RAW video from the X5R. Be prepared to get more software, storage and possibly a faster computer.