Trial chambers chamber_2 template has a copper bulb behind the wall on the north east and south east side

Steps to reproduce:

1. Run /place template minecraft:trial_chambers/chamber/chamber_2

2. Destroy each of the blocks next to the copper bulbs in the walls

Observed result:

As shown in the image, a copper bulb generates behind that extension in the wall, right next to where a wall dispenser goes, which makes it off from the rest of the room, other than the other side it occurs with (it's on the opposite side of the wall).

Expected result:
The copper bulb should be tuff bricks to consistently go with the rest of the template.