After doing some trades with my cartographer, the price with the glass pane has been reset, yet there is no mention of this happening in the patch note ( i think ) This happen to both carthographer i had. This was annoying to me the fact that i'd have to keep recuring villagers just to keep the price low on a useful trade. I doubt it because of my optimization mods since it doesn't change vanilla gameplay at all. (Edit, i tried in vanilla, the problem persist)
This is not a visual bug and oddly enought, after a day, it came back to normal only to be bugged again and back to normal.