Java 1.8.0 Build 121 Win7 x64
Placing two items of the same type/grade into crafting box does not allow them to be repaired.
This is only observed with doLimitedCrafting(true)
Discovered/Reported during the following Livestream. Evident around the 15min mark https://gaming.youtube.com/watch?v=GP-KANmtFM4
MC-115361 doLimitedCrafting set to 'true' disables ability to combine used tools