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.
MC-133104
Torch placement not possible from off hand
Resolved
Duplicate
1
Johannes
(Unassigned)
Unconfirmed
Minecraft 1.13-pre6
Retrieved
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However, this issue is a Duplicate of MC-132635.
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