Mod Version: 1.20.1-2.6.3
Loader: Forge
Happens on single/multiplayer?: Yes

Issue: Further than vanilla blockreach will not let you open chests through signs/item frames
To Reproduce:

1. Get any item that extends your default block placing/destroy/interaction range (Aether's Valkyrie tools, Botania Ring of Far Reach)
2. Try to interact with a chest with a sign/item frame ontop from 3+ blocks away, you cannot open it.
   You can click the sides of the chest to open them, but not any in which the Passthrough Mod comes into effect

Vanillas block reaching code is a huge mess. Got majorily change in 1.20.2 & will as well in 1.20.5 (It looks like).
I might look into fixing, if this is still an issue in the future, but I will unfortunately not fix it for 1.20.1

Thanks! Good thing it got more official support in the new versions, not sure if it's a smoother kind of spaghetti this time around though. Maybe they got kingbdogz to help, they nailed farther reach in 2011.