Your tileset is missing the tiles needed for these cases.
For tiles with three sides matching, there are four corner possibilies (for the two corners between the matching sides):
- both corners match
- no corner matches
- only corner A matches
- only corner B matches
Your tilesset has tiles for both or no matching corners, but it’s missing both variants for only one corner matching (for each rotation of that tile).
(It seems the tiles for ‘four matching sides’ > ‘two diagonal corners matching’ are also missing.)