Stuck Indefinitely on Building Terrain upon exiting the Nether 02/22/2020 v1.14.30

if you have a shield, take it off; and use a hotbar that there's no item in it when you want to go through the nether portal.

I had this problem too and this solution worked!

Thank you for your report!
However, this issue is a Duplicate of MCPE-44815.

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