[0.17.11] Tree flickers between in front/behind wall ghost

[micro500]

I ran into this visual bug where as I walk around trees sometimes render in front of a wall ghost, and sometimes they render behind. The example video has me walking up and down, but I've seen them randomly flicker while walking in a single direction.

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[posila]

Thanks for the report.
The tree and the wall ghost are at exactly same position, so for sprite sorting they end up being equal. According to benchmarks, stable sort is little bit slower than sort that we use now, so I don't think it is worth fixing at the moment.