I would be extremely grateful if you give me a minimal reproducer.

This update has been unpushed.

I hope this is the final state of the project

@ueno yes, please drop then

Fixes a regression

Necessary to fix key encoding issue

Necessary to fix key encoding issue

LGTM

Yes, unfortunately this problem was fixed after the 3.0.3 was published.

Reviewed the test results with Jakub, situation looks like expected.