The bug
Observers do not update upon tree growth unless they were already observing the sapling.
Also, block states are not updated properly, for example fences do not start connecting.
[media]
Code Analysis
A code analysis by @unknown can be found in this comment in MC-136442.
Related issues
is duplicated by
relates to
Attachments
Comments


This does not affect 1.12.2

I tested it out on 1.13-pre-1 and it worked, it even captured the sapling growth stages!

See the gif; it works with the sapling; it doesn't work with the log above the sapling
Can confirm.

note*piz do not mark unreleased version,you don't have access to the game version.

...Except I have access to 1.13pre8?

Can confirm, Observer does not see block Update of tree’s growing. 1.13(pre8)

Confirmed in 1.13 stable, my poor tree farm is now useless.

That's already marked as affected...

Getting the same with 1.13.1

@unknown 1.13.1 is already marked as affected

I hope they will fix this bug in the next few updates

Me too. Personally, I think there should be updates dedicated only to bug fixes, but I don't control the update schedule so what can you do :/

1.13.2 still same problem. any idea on the solution?

Bug has been open for half a year now, is it possible to get a progress report or escalate the priority of fixing this?

someone who's good with minecraft code help me budget this my tree farm is dying

Confirmed. Still a bug in 19w03c

Hey guys since this is still a problem I did find a way around it for those tree farms for right now. It can be found here: https://youtu.be/FcrRmz5x890. It will work without the smart saplings also.

Still in 19w13b and 19w14a

Still in 19w14b and 1.14 Pre-Release 1

Relates to MC-107664

It would be nice if this was fixed in time for 1.14

Still in 1.14 Release

this is not fixed in my version of 1.14 Minecraft on Java edition....This is not resolved

It says it's fixed in a future version. This should say 1.14.1+

confirmed fixed in 1.14.1pre1

This appears to still be an issue for 2x2 spruce trees in 1.14.2 pre2

I can't confirm this. It seems like 2x2 trees need the surrounding airspace in order to grow, so unfortunately I can't think of a way to test this. If you have direct evidence of this still occurring please do post it here
If 2x2 tree growth cannot be detected, please create a new ticket about that, as large trees are a special case.