When i close a large vessel, and quit the game. After return to the game, the icon show the vessel is open and the date of the close disapear. But the vessel still closed.

Before quit the game

After play again

Please provide a complete report. Are other mods loaded? Is this consistently reproducible?

Is consistently reproducible.
Mods: Better Foliage, Bookshelf, Controlling, CraftTweaker, CreativeCore, Debark, Dynamic Surroundings, FastFurnace, FastWorkbench, FoamFix, ​Game Stages, GraveStone Mod, Hwyla, Inventory Tweaks, Just Enough Items (JEI), Just Mob Heads, LittleTiles, Mouse Tweaks, No Recipe Book, OreLib, Placebo, Realistic Item Drops, Shadowfacts' Forgelin, Smooth Font, TFCTech Unofficial, Toast Control, Waila Harvestability, Waila Stages, Xaero's Minimap, Xaero's World Map

I can reproduce this just with vanilla TFC.

The issue is that the GUI shows it open, while the block in-world is closed. The GUI doesn't allow placement of anything into the vessel, so it still is actually closed behind the scenes.