The animations of the Warped and Crimson stems are not working. They just remain on a single texture and not move. It doesn't look like the red/blue part is pulsing through the block.
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I have noticed that anything that has animations and belongs in the nether,it freezes on one texture and doesn't move at all.
This includes nether portal, fire, soul fire, sea lantern, seagrass, and kelp.

Thank you for your report!
We're actually already tracking this issue at MCPE-76180, so I will resolve and link 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.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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