Thanks for the tip about Jira. I only just now noticed that there are two separate dropdowns for "extra" tags. WTG Jira.
I definitely did use the search feature, which is how I linked the old issue. This is also literally just a regression of the old issue. Previous to minecraft 1.11 the custom potion effect for saturation worked exactly as expected. Go ahead and try it in 1.7.10
/give @p minecraft:potion 1 0 {CustomPotionEffects:[{Id:23,Duration:3600}]}
The old ticket is marked as resolved, and yet the issue still exists.
Sorry for all of the janky edits. Jira doesn't have a decent <code> tag, and the previews didn't match the final ticket.
No, this is not. 6000 ticks is five minutes.
This is a reversion of MC-112389.
This custom potion effect hasn't worked since 1.11, even though the ticket was marked as resolved. Try it in 1.7.10, you'll see it works just fine.