Thanks Robin.
I just contact Nikon about my issue and here is the answer and resolution.
This behavior can be linked to two main points:
The use of the AF-ON button combined with the “Focus” priority in the autofocus setting a2. If the camera does not confirm focus, it will block the shutter...
Hello,
Could you please share what was the resolution ? I'm facing the same issue. The D850 does take 1 or until 3 pictures maximum. I set it to 8.
Thanks in advance.