When opening the Forge menu and you change the Y axis viewport of the game (how tall the game is), the bottom of the trash can disappears and the Forge menu isn't properly centered on the screen. Continuing to make the game viewport taller and shorter eventually makes the entire Forge menu disappear from the screen.
v1.6.15 build 24356
No error logs
Windows 11
English
single-player
Both controller and mouse + keyboard.
I did add the items to test this via SMAPI. After saving the game I removed all mods and opened the save with the vanilla game. These 3 images are in sequence (starting viewport, taller viewport, back to starting view port with a forge inventory row cut off)