Trial chambers' encounter_4 trap does not activate

The dispenser trap in encounter_4 does not work in Java Edition due to the redstone dust breaking on top of the rightmost dispenser.

Steps to reproduce:

1. Run /place template minecraft:trial_chambers/hallway/encounter_4
2. Go in the room
3. Activate the tripwire

Observed result:
Nothing happens as the dispensers are not powered.

Expected result:
The rightmost dispenser being powered by a redstone dust on top of it, causing the left dispenser to activate causing the trap to function as normal.

Initially I thought the redstone was not there at all, but after further investigation it looks like it immediately breaks.