Bug: Lemon Squeezy Stops Counting Usage After First Tier in Graduated Pricing

Hello,

I’m curious whether anyone else has encountered this bug.
I’m trying to set up a subscription with graduated pricing. For example:

Units 0–100 → $2 per unit
Units 101–300 → $1.50 per unit
And so on

The bug is that Lemon Squeezy stops counting usage once the first tier is reached. If the first tier is 0–100, it stops at 100. If it’s 0–5, it stops at 5.
My settings appear to be correct. I’m using:

“Sum of usage during period”
The Usage Record Increment endpoint

Counting works fine until I reach the end of the first tier.
This might be happening because I’m in test mode, because I can’t imagine this would occur in production. If it did, people could essentially use unlimited resources beyond the first tier without being charged.

If anyone could test this on their end, I’d really appreciate it.

Thanks in advance!