Hello.
As the title says, the White and Yellow Stained Glass textures are inverted, and this also affects the Stained Glass variants, in the Plastic texture pack.
I've provided a few attachements which show the bug, where the White glasses are Yellow, and the Yellow glasses are White.
I hope you can get to fixing this. Thanks!
This is also happening in the City texture pack; Windows 10 beta 1.2.0.11 Gui:4.
The edges of the panes however are correct. MCPE-24004 is most likely the same issue.