Multicam syncing using timecode

We working on PC , media is Apple prores 422, 1080i50

Adobe version is 23.1

I have a multicam question :

I have 4 angles. And by accident on 3 of them there is been set an IN point, and on 1 angle no in point.

Now when i use : Create Multi-camera source sequence  based on timecode , what we see that he makes a multicam based on the IN points of the source and not the Timecode as i indicated in the menu. 

What is more wierd is that he puts in the multicam sequence the three angles with the IN point in black until it matches the clip where there was no inpoint  (instead of showing the image that is there because all camera's were rolling for serveral seconds before the in points).Match frame on that black angle is also not possible.  When i delete the in point in the three video clips and say again create multi-camerasource sequence on timecode : he does it correct.. To my recollection : isnt this a bug?  

Am i wrong? and does IN point always overrules the timecode ? 

Anybody seen this also ?