When you look through glass pane at a west/east angle and the glass pane is at a west/east angle, the edge is not transparent. However, north/south glass pane are transparent from all directions.
When you look through glass pane at a west/east angle and the glass pane is at a west/east angle, the edge is not transparent. However, north/south glass pane are transparent from all directions.
Please don't put down the affected version as a future version. You DON'T have access to it yet!
The error is most likely a broken resource pack. Please switch to the default resource pack, and see if it occurs there.
EDIT: Tested on default resource pack. Cannot reproduce.