Wall texture bug?

[green thunder]

I have my wall opacity set to 20%, and was playing this custom map:
https://synthriderz.com/beatmaps/6468

For some reason the wall textures opacity space is not rendering at all. (Appears as if opacity was set to 0%)
It's not the wall total in the map that's the problem, or the ratio (walls/sec), because this map beats it in both total and ratio.

https://synthriderz.com/beatmaps/9298

Does anyone have any idea what's going on?

(I know custom songs aren't allowed here but I don't think it's a mapper problem, I think it's a game problem so I thought I'd post this here)

[solid trench]

If too much walls are condensed in certain areas the game will force them to render as "wireframe" to save on performance. You can manually toggle all walls to be wire frame in the appearance tab

From the looks of it 6k+ and 8k+ walls i am assuming it's kicking in

This is expected behavior.

[crisp quail]

Yeah, this is intended behaviour as the game protects its own performance.