This applies to updating Skyblock (1.4 world) to 1.8 or updating a 1.14.4 world to 19w36a. This causes problems like crops not growing from 1.4->1.8, or no fall damage or phantoms from 1.14->19w36a.
How to replicate:
1- Make a world in 1.14 with cheats enabled so you can /gamerule.
2- Update to 19w36a on that world.
3- Do /gamerule drowningDamage/fallDamage/fireDamage/doInsomnia.
What I expected:
The gamerule should be set to its default.
What happened:
The gamerule is set to false.
Thank you for your report!
We're actually already tracking this issue in MC-160464, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. Depending on the resolution, that can mean that it either will be fixed in the next version, or that it is not considered a bug and won't be fixed.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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