I did /effect Arceus_500 1 100 100 (I tried it with other durations/speeds)
*What I expected to happen was I would keep my speed effect.
*What actually happened was when I entered the Nether, I lost my speed effect, but the particles were still coming off me and once I sprinted, I got it back. it is the same thing with re-entering the Overworld.
Steps to Reproduce:
1. Do the command /effect @p 1 <duration> <amplifier>
2. Enter the Nether/re-enter the Overworld
3. No speed effect until you sprint.
Duplicate of MC-28447 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.