Trial chambers' encounter_4 trap often does not hit the player

The dispenser trap in Encounter_4 does not work consistently in java edition due to Projectile/Redstone timing disparity. (this report is not about fixing those parity issues)

Steps to reproduce:

1. use the command: /place template minecraft:trial_chambers/hallway/encounter_4
2. go in the room in survival mode
3. jump to the platform that has the trap

Observed result:

the arrow comes out too early and often fails to knock off the player (unlike Bedrock Edition)

Expected result:

the player would be knocked off into the pointed dripstone (like Bedrock Edition)

To fix the issue, the layout of the room in Java Edition can be changed so the trap works (which is better than leaving the room as is for the sake of layout parity).