Glass panes looks ok only when looking at them facing north or west.

Optifine version is the latest for 1.19.4 and Optifabric is the latest Actions Build version 1.13.24

Can confirm, I'm also having this issue.

I am also having this issue

Can also see this, on fedora linux 1.19.4

Can also see this, on fedora linux 1.19.4

It’s the same issue, it’s not different

Just wanted to comment how I fixed this issue: I found out that a mod called fusion (https://modrinth.com/mod/fusion-connected-textures) launches with OptiFine just fine. Using Midnighttigger's Default Connected Textures (https://modrinth.com/resourcepack/mt-ct-d/version/tfKvt8nl) and putting it as lowest priority on the resource pack list (but not below MC itself or fabric), it gets rid of this issue. Plus, OptiFine's implementation still works for other resource packs. Its a win - win.

Tested with Fusion 1.0.5a and Optifine HD U I5, Optifabric 1.13.25, and FAPI 0.83.1 (+10000000000 other mods but you get the point)