I was surprised that my camera calibration no longer matched reality…, I was both surprised and disappointed, because the last calibration took me a relatively long time and was (almost) perfect.
What I didn’t think about or overlooked was, that last night I took my nozzle off and looked after my lens, just routine. But when assembling the nozzle after inspection, I changed the nozzle placement in height (not FP), that’s the variable adjustment options for the height from the nozzle to the machine bed.
I laughed a little at myself after I found the error, it’s a typical F47. 
I adjusted the bed height until the camera image matched the control part, loosened the clamping ring from the nozzle and adjusted its height to match my focus distance block, job done. The best part is that my camera profile/calibration still fits quite precisely.