The bug

MC-70127 was marked as fixed for 1.20.2 pre-release 1. However, saplings are still seemingly affected by the issue.

How to reproduce

1. Open your F3 screen
2. Run the command

   /gamerule randomTickSpeed 100

3. Place a sapling (a single dark oak sapling will not grow but still changes its "state" value making it ideal for this test), paying attention to the right hand side of the screen where it lists block states
4. Wait five seconds
5. Right click the sapling
6. If "state" does not change from 0 to 1, repeat steps 4-5

Expected results

The stage state of the sapling would increase on its own, which would be reported by the debug screen since you're looking at it and right clicking on the sapling wouldn't do anything.

Actual results

Right clicking the sapling causes the displayed "stage" value to instantly increase from 0 to 1, implying that the block's state change on the server was not communicated to the client until a player interaction with this block forced it to update client-side.