If you replace a block with a slab it seems to ignore orientation all together.
Steps to reproduce:
Should be fine for tetra and hepta blocks
Corners and wedges are usually incorrect (see tester information)
Works fine for all block types.
However, replacing cargo space with any block will still force that block into the default orientation and not use the one you have selected in advanced build mode.
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-Confirmed-
This is something that happens for most blocks, mostly because it's something that's not implemented.
What works:
What doesn't work:
This also (and has for a while) occurs with corners, using remove/replace with corners usually requires going back and fixing them.
Its also been happening with heptas,recently, simply changing from one hepta to another (hull to standard or one color to another) will place the new block in default orientation.
-QA Testing-
Partially fixed:
Depending on block type you want to replace with, you'll get correct or incorrect orientations.
These tests were all done by replacing blue cubic hull with different orientation blocks (hepta, tetra, ...). It shows the same behaviour for other similar tests.
What works:
What doesn't work:
Image that might clarify a bit:
-QA Testing-
Works fine for all block types.
However, replacing cargo space with any block will still force that block into the default orientation and not use the one you have selected in advanced build mode.