I have a window union with a glass pane texture recessed within it by 0.4 studs.
When I view it from a distance or at an angle, the following behavior occurs in which the texture shows through both the union and normal bricks. This occurs both in studio and in-game.
I assume this is an engine bug, however, I do not have permissions to submit a formal bug report.
If someone with those permissions agrees with my assessment, could they please forward this to the proper forum?

Video of behavior:
https://i.gyazo.com/3b4b9bd52205309f7cdb0fd0b861b591.mp4
Attached below is the world file from the demonstration:
SingleWindowUnionExperiment.rbxl (38.7 KB)