when going to the end and using a nether portal in creative mode by using fill command will
make minecraft bring you to the overworld and you can move around but minecraft will always think you are in the spot where you came back so you can only interact with stuff near where you spawned
you can replicate this by
making a command block spawn particles where you are using execute command
then go the end
then use the fill comand to make a portal
go in to the portal
and the particles will show you where minecraft thinks you are
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We're tracking this issue in MCPE-34142, so this ticket is being resolved and linked as a duplicate.
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