Lightroom Classic freezes when importing Nikon D850 Files under Catalina

MacBook Pro (Retina, mi-2012)

2,7 GHz Intel Core i7 4 hearts

16 Go 1600 MHz DDR3

NVIDIA GeForce GT 650M 1 Go

Intel HD Graphics 4000 1536 Mo

LR Catalogue is on a SanDisk Extreme SSD Media with 932 Gb Free

Since Mac OS Catalina Lightroom Classic freezes after hitting "import" with Nikon D850 files.

- The files are read in the import section

- The files are placed in the right folder on my SSD even though LR is reporting import still occur

- During that freeze, all sections what so ever display the corect amount of photos in the corect folders but will only display "Charging" instead of showing photos

- Have to force quit the App

- When restarting LR some photos made it into the library but at least half of them didn't (All photos are at the right place on my SSD)

What I've tried

- Reboot : Same Issue

- Uninstall/Install LR : Same Issue

- Tried to import them directly from the folder in the lightroom catalogue : Same Issue

- Photos can be imported in Apple "Photo" App

- Tried to export them from Photo App and import them from finder : Same Issue

- Used Adobe DNG converter and tried to import them as DNG -> Same Issue

- This occured with an XQD card read with a card reader, tried with an SD plugged directly into the Mac -> Same Issue

- In System preference/Security & Confidentiality/Confidentiality, Authorize LR to have access to all my drive : Same Issue

- No issue with my Leica Q2.

We are November 10th 2019 and just installed the lastest update available.

Is there anyone not having this issue with Lightroom Classic/Catalina/D850 ?

Is there a workaround ?

{Moved from Lightroom Cloud to Lightroom Classic Forum by Moderator}