Half grates can cause map leaks

[thesamfizz]

BEE2 version: 4.39.2

Description of the bug: When placed in certain corners of geometry, the half grate item can cause a map leak. The exit door won't render and deadly goo will be nodraw. I got around this by having an empty voxel diagonally opposite and below the half grate, pictured below.

Expected behavior: Placing a half grate anywhere inbounds should not cause a leak.

Steps to reproduce: I'm not sure how to reproduce 100% of the time because some half grates cause problems and others don't. What I noticed in my map was a half grate in a corner of two full voxels that caused the issue, pictured below.

Additional information:
The half grate in question:

When this empty voxel in the corner doesn't exist (I placed an angled block in it to make it look like there's a wall from inbounds), the map has a leak: