Ahh, that's an unintended consequence of intended behaviour. There's some jank set up to stop players capping on the barrels.
In retrospect, letting players cap on the barrels isn't a huge issue, but there is a question on how to fix it.
Currently, players leave the low capzone at the edges when jumping, making capping there feel inconsistent.
https://cdn.discordapp.com/attachments/1055714864284323941/1164150541216120892/image.png
Option A: Raise it to platform level, only preventing cap when high enough to stand on platform.
https://cdn.discordapp.com/attachments/1055714864284323941/1164150541581041735/image.png
Option B: Raise it only to just above barrel height, allowing capping on barrel unless the capper jumps.
https://cdn.discordapp.com/attachments/1055714864284323941/1164150541962711090/image.png
Personally, I find Option A more consistent, but I would prefer feedback before I push an update.