The vines cannot be placed on the ceiling if they are stuck together ONLY under "non-solid blocks" : stairs, slabs..
After a certain time (random tick speed = 2000), they disappear
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galaxy_2alex
Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-128672, which is a report that has not been resolved yet.
If you want, you can upvote the parent ticket, and enable watching to receive any updates about it - if you believe you have any information that may be important for this issue, please leave a comment on the parent. Please also use the search function in the future to prevent duplicate reports.
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