When destroying gravel with a shovel, and having torches in your offhand, there is a bug. If you hold down both left and right-click, you will break the gravel, and then place the torches, and the gravel will not fall and break on the torch like it is supposed to. It doesn't move and the torch stays where it is.
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mxblue28
violine1101
Thank you for your report!
We're tracking this issue in MC-838, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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migrated
This happens because you place the torch in the same tick that you break the bottom block, so the gravel doesn't have time to detect the empty space below it and turn into a falling block entity.