I spent some time today and upgraded to 2019 R3 to see if that made a difference for me. It picked up the shared topology for the blind hole, but I still couldn't get all of the partitions to mesh. I must have some settings different that's causing it not to work like yours. Then I attempted the additional slice you recommended. With the exception of a couple of partitions that I think I can probably fix, everything meshed just fine except for the highlighted area below. It didn't want to mesh even if I started there.
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New Post - Reply To: Meshing Issue with Through Hole Close to Perpendicular Blind Hole