Thin white border on transparent window?

Can you solve regarding white border issues, on transparent background?

currently, i'm on making apps with base library winappsdk version 2.1 but still i couldn't solved issues that appeared on my window background transparent.

in HDR mode, the thin white border, removed or invisible.
but in SDR mode, it's shown. it's like this

more details, here's my apps: [github.com/fbtwitter/Hatch](https://github.com/fbtwitter/hatch)

or should i migrate the project to winappsdk 1.5.8 instead?

Thank you

Start by reproducing the linked Hatch app with WinAppSDK 2.1 in SDR and HDR modes, then compare the transparent-window behavior. Check whether changing to WinAppSDK 1.5.8 affects the border; done means establishing a reproducible framework issue or a version-specific workaround.

Written by the indexing model from the issue text.