This bug has been present in all the 1.13 releases, and still persists in the 1.14 snapshots. Screen capture taken in 19w13a attached above.
I saw 102223 with a lot of "RESOLVED" tags, wasn't sure that it was still active. I'll keep a lookout over there. Thanks!
Please let this be a bug and not a "feature"
This is in snapshot 19w12b.
[media]The structure block attempted to load all the 4x4 paintings one block too high, and they got bumped. the 1x2 loaded a block higher, on top of a redstone torch. the 3x4 loaded correctly.
Really glad to see this getting fixed. Good call splitting the two issues.