BEFORE POSTING A BUG REPORT, PLEASE ENSURE THAT IT IS A UNIQUE BUG AND NOT A COPY OF ANOTHER OPEN ISSUE.
IF THERE IS AN IDENTICAL OPEN ISSUE, PLEASE ADD YOUR INPUT AS A COMMENT TO THAT ONE.
IF YOU ARE UNSURE IF THE ISSUE IS IDENTICAL, ASSUME IT IS NOT.

Include the following at the top of your report:
Minecraft version
1.21.1
Mod Loader (please include the version!)
NeoForge 21.1.196
Mod version
v2.3.1
Any other mods you are using. Include the versions. A pastebin or equivalent link is recommended if you have more than 3 additional mods.
Slab Machines v6.0.1, Double Slabs v0.2.3

Describe the bug
The lines showing how blocks will be orientated upon placement do not show up while holding Slab Machine slabs, and you cannot place Slab Machine slabs vertically. Placing two Slab Machine slabs in a single block, either the same or different - with the Double Slabs mod active - does not work either, for horizontal or vertical placements.

To Reproduce
Steps to reproduce the behavior:

1. Attempt to place a slab machine vertically.
2. Does not work.
3. Place any slab machine
4. Attempt to place a second slab machine (any) in the same block space as the first.
5. Does not work.

Expected behavior
One should be able to place Slab Machine slabs vertically, and if Double Slabs is installed, place two such slabs in the same block horizontally or vertically.

Screenshots
If applicable, add screenshots to help explain your problem.
Not Applicable.

Additional context
Add any other context about the problem here.
No Additional Context.

Please upload the crashlog (if applicable) or game output log (latest.log in the logs folder, not the log from your launcher!). Additional logs may need to be added upon request.
latest.log