[1.12.2] uvlock not working

[SuperManitu]

Hi,

I have a rather simple block at the moment that I assemble out of submodels based on blockstates.

Spoiler

{
    "multipart": [
        { "when": { "first_end": "north" }, "apply": { "model": "techmod:cablecar_track_normal" }},
        { "when": { "first_end": "south" }, "apply": { "model": "techmod:cablecar_track_normal", "y": 180, "uvlock": true }},
        { "when": { "first_end": "west" }, "apply": { "model": "techmod:cablecar_track_normal", "y": 270 }},
        { "when": { "first_end": "east" }, "apply": { "model": "techmod:cablecar_track_normal", "y": 90 }},

        { "when": { "second_end": "north" }, "apply": { "model": "techmod:cablecar_track_normal" }},
        { "when": { "second_end": "south" }, "apply": { "model": "techmod:cablecar_track_normal", "y": 180, "uvlock": true }},
        { "when": { "second_end": "west" }, "apply": { "model": "techmod:cablecar_track_normal", "y": 270 }},
        { "when": { "second_end": "east" }, "apply": { "model": "techmod:cablecar_track_normal", "y": 90 }},

        { "when": { "first_end": "north|south", "second_end": "north|south" }, "apply": { "model": "techmod:cablecar_track_middle" }},
        { "when": { "first_end": "east|west", "second_end": "east|west" }, "apply": { "model": "techmod:cablecar_track_middle", "y": 90 }}
    ]
}

 

But the rendered Block looks like this (this block is `[first_end=north,second_end=south]`)

Spoiler

Am I misinterpreting uvlock? Or how should I solve this?

Edited December 26, 2017 by SuperManitu
missing image

[quadraxis]

What version of Forge are you using?

[SuperManitu]

I tried both recommended and latest, same issue (2555 and 2581)