Antlines and signage don't transfer to the front of Flat and Angled Blocks

[FrozenDragon0]

BEE2 version: 4.39.2

Description of the bug: Antlines and signage don't transfer to the front of flat or angled blocks.

Expected behavior: Per the description of flat blocks and angled blocks, setting "Start Enabled" to true should make antlines and signage transfer to the front of the blocks. For angled blocks, I would expect this means the antline goes across the sloped surface. This doesn't currently work for either--the antlines stay on the wall behind the blocks regardless of whether "Start Enabled" is true or false.

Steps to reproduce: Have antlines go behind a flat or angled block, set the block to "Start Enabled" true.

Additional information: Both the flat block and angled block in the screenshot have "Start Enabled" set to true: