P: Panasonic FZ80/82 white balance problem

Simon, actually it is quite severe. I downloaded sample Panasonic DC-FZ82 RW2 raw files from the below site and see WB issues very similar to Alan Orlic's  posted 2017-10-01-13-27-18-109246.RW2 file.

These Daylight scene referred images all have 'As Shot' WB readings close to 3500, -30. The LR Daylight setting is 5500, +10. That's a 2000, +40 WB incremental difference.

http://www.photographyblog.com/previews/panasonic_lumix_dmc_fz82_photos/

Thanks for the sample files. I could see a slight magenta color cast when setting the WB to Auto or Daylight, although it is not as severe as what you have reported. The team will investigate further.

I don't use the panasonic. Nor any auto WB in any soft I use. This is many time risqué!
Everybody may work following it's own references.
But if you ask an auto WB with the kind of picture you show us, I imagine that the auto function won't be able to find the correct white reference to realise a correct WB.
More on that, do you use this auto  WB on RAW files? JPEG's are almost difficult to set up correctly

Las but not least can you provide a RAW or TIFF format of that   picture? 

Could you provide a sample image file? Thanks.

No, the same. I also checked with Raw Therapee and problem is the same, looks like Panasonic has an issue?

Sometimes weird behavior is corrected/cured by resetting the preferences. 

Reset Procedure: 

1. Close Lightroom.
2. Hold down [Alt/Opt]+[Shift] while restarting Lightroom. 
3. Overwrite the Preferences when prompted by the dialog.
4. Close Lightroom.
5. Restart Lightroom.

Does the WB behavior continue after resetting the preferences?