After reconnecting the drive with the RAW files to the computer the problem is solved!? All images are OK now in CameraRaw and Photoshop. I have no idea what was going on?
But did you use different settings yesterday and today?
Could you provide one of the affected RAW files?
As the issue seems to be with the developing maybe you should also post on the Camera Raw (or even the Lightroom) Forum.
I used exactly the same settings as yesterday as the settings are included in the CR3-file. I don't use separate XML-files for the settings. No promblem to provide one of the RAW-files, but I can not upload files larger than 47MB? The CR3-file is 54.3Mb. Can I send it to you, using WeTransfer or something?