When entering into the GUI for certain furnaces, the smelting animation is above the rest of the GUI. Relogging into the world fixes the glitch only sometimes 2/10 furnaces tested had this issue. Breaking and then replaces the furnaces removed the glitch. Furnaces were made in the nether, using only buckets of lava for smelting.
Environment
Windows 10 v2004 Build 19041.450, OpenJDK v8.0.262.10
Linked issues
duplicates 1
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Comments 3
Duplicate of MC-10025
Can you explain what you mean? The GUI is always same for me, and I don't see the problem in your screenshot