Sponge placed using commands cannot absorb water.
Find a water area and in the water execute
/setblock ~ ~ ~ minecraft:spongethen the surrounding water was not absorbed.
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Jarl-Penguin
Thank you for your report!
We're tracking this issue in MC-31100, so this ticket is being resolved and linked 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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Duplicates MC-31100 🙂