[MC-187392] Items in waterlogged stairs don't float up high enough to be caught by a water stream above the stair

I was making a sugar cane farm made by TangoTek on YouTube. When trying to use a water stream with all source blocks with a waterlogged stair at the end with a water stream above it, the item caught in the stairs flows up but is not caught by the water stream above it. This bug is only present in 20w22a and 1.16 Pre-Release 1, as it works in 20w21a and before just fine.

To reproduce

Download world file for sugar cane farm from https://www.youtube.com/watch?v=H5mAWw3RrAY
Load map in 20w21a and set randomTickSpeed high
→ ✔ Observe items properly flowing high enough to be caught by stream
Load map in 20w22a or 1.16 Pre-Release 1 and set randomTickSpeed high
→ ❌ Observe items getting stuck in stairs not flowing high enough to be caught by stream

Linked issues

is duplicated by 1

MC-187476 Items fall of at stairs with flowing water Resolved

Attachments

1.16 Pre-Release 1.mp4

20w21a.mp4

20w22a.mp4

Comments 1

[Mod] violine1101 2020-06-04T20:41:39Z

Confirmed. For easier reproduction, I've attached a screenshot of my test setup. Waterlog the stair and throw an item inside of it. It will flow upwards and be caught by the item stream in 1.15.2, but it will stay there inside of the stair in 1.16-pre1.

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