With the fence/wall changes in this beta, placing a torch on a section of cobblestone wall causes the torch to appear to float above the wall, unless the torch is placed at an end or corner that causes the cobblestone wall to have a "stanchion." Prior to this beta it used to create the "stanchion" for the torch when one is placed, but now it does not and the torch height appears to expect it to be there.
Thank you for your report!
We're actually already tracking this issue at MCPE-65404, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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