これは Ren'Py 固有の問題だと思われます。かなせんせい v0.5.0]のベータテスト中、このゲームは Ren'Py v8.3.4 の安定版と一緒に出荷されました。しかし、テスト中にもっと重大なオーディオ関連のバグが見つかり、多くのベータテスト参加者に影響を与えてしまいました。結局、Kana Sensei v0.5.1.2をRen'Py v8.3.5.xxxxのnighty-buildでリリースしました。
今のところ、Ren'Py v8.3.5が安定版としてリリースされるのを待っています。次の安定版でオーディオ関連の問題が解決されることを期待しています。
でも、このバグについての詳しい情報をありがとう。細部への配慮にとても感謝しています。
This is likely a Ren'Py specific issue. During the beta testing of [Kana Sensei v0.5.0], the game was shipped with the stable release of Ren'Py v8.3.4. However a more significant audio-related bug was found during testing which ended up affecting a lot of my beta-testers. Weighing my options at the time, I ended up releasing Kana Sensei v0.5.1.2 on a nighty-build of Ren'Py v8.3.5.xxxx since it fixed the more significant bug that was found, but it seems that some new audio-related bugs were found as you discovered.
At the moment, I am currently waiting until the stable release of Ren'Py v8.3.5 before I update the game again. I am hopeful that the next stable version will resolve these audio-related issue.
But thank you for the detailed information about this bug. I greatly appreciate your attention to detail