Putting torches in the off hand won't let you place them, they disappear from your inventory and reappear upon restarting the world/reconnecting to the server again.
Environment
Java version: 1.8.0_172
OS: Win 10 Home (64-bit)
Processor: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz 2.60GHz
RAM: 16GB, 8 GB allocated to Minecraft
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However, this issue is a Duplicate of MC-132635.
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