Kasane Teto's "I" phoneme distorted from resampler

[Kookietester]

Acknowledgement

• I have read Getting-Started and FAQ
• If dealing with version 0.1.549 or higher, you have installed the .NET 8 runtime

🐛 Describe the bug

I updated my Openutau from ver 1.564 to 1.568. I use Kasane Teto English with no problems before, but for this version her "i" and "I" phoneme sounds distorted when using WORLDLINE-R resampler. However, when using the classic one (worldline and convergence) she sounds back to normal again. Due to this, I could not use the curve features as I heavily rely on it when using Teto.

Explains how to reproduce the bug

https://drive.google.com/file/d/13ZRdiur4wPH0VO0VC7_B43TrRWqUAURh/view?usp=sharing

I made a ustx file specifically on her singing the "i" and "I" phonemes. Just set the samplers to WORLDLINE-R with X-SAMPA parse.

Then, try changing the resampler to CLASSIC (which comprises of worldline and convergence) and hear the difference.

OS & Version

Windows 11

Logs

log20260528_001.txt

[nagotown]

Made a short video demonstrating this since GitHub doesn't embed audio.
This was also reported in the Discord server, but it hasn't been pinpointed when between stable and beta that this change occurred.
Also, just so you know, you appear to have accidentally set the Google Drive link as the title of the link rather than the URL.

worldlinerVSworldline_beta.mp4

[Kookietester]

oh sorry about that, here's the actual file
download link

I think when I first download the 1.568, the bug started to occur. Because the previous version that i use doesn't have any of the sort.