Rail can't be placed on the slime block

[ABKQPO]

Initial Questions

• I have searched this issue tracker and there is nothing similar already, and this is not on the list of known issues. Posting on a closed issue saying the bug still exists will prompt us to investigate and reopen it once we confirm your report.
• I have verified that this issue occurs in a SUPPORTED environment, meaning I can reproduce this WITHOUT OptiFine, and without Bukkit+Forge server software like KCauldron, Thermos, Crucible, Mohist etc

Mod Version

etfuturum-2.6.0-master.40+47e7965a12

Describe the Issue

When I tried to make an aircraft, I found that the rails couldn't be placed on the slime block
This is the aircraft I made in a higher version

Conflicting Mods

No response

Crash Report

No response

Other Details

No response