[Issue]: Block Stitching on stairs

[Benjazum]

Description

Issue with block stitching on stairs, only seems to appear when stair blocks are regularly connected to normal blocks:

I have tried to add stair blocks and cobblestone blocks for testing in the "Block Crack Fix" tab in false tweaks config but no change. Fix did disappear when shaders mod was installed - Optifine shaders do not fix this like the Shaders core mode does

fml_client_latest.log, and crash reports, if any.

FML client 10.13.4.1614

I have submitted the required files

• I confirm that i have attached the required log files as a github attachment, and not as a pastebin/mclogs link.