when you switch to a third person perspective, the starting point of the touch block is the location of the camera, not the player model, This causes the touch distance to be shorter when the third person perspective is turn on, if you do not turn on the separation control setting.
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We're resolving and linking this ticket forward as a duplicate of MCPE-134760, as that ticket contains more detailed information and/or has already been triaged by Mojang.
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