Issues with external subtitles tiles co-existing with closed subtitles included in mp4 container

[justdanyul]

Describe the bug

1. Find a mp4 container with closed subtitles included (not burned in)
2. Add an external subtitle file next to the video file above, matching names etc.
3. In Swiftfin on TVos the external subtitle file is now automatically displayed
4. Now, using the UI, I can see in subtitles included in the video in the menu but if I select them, nothing happens, the external subtitles are still displayed, and I cant switch from them

I tested the same file and functionality on the Android TV client, and here the behaviour is as expected, I can switch between both the included subtitles and the external subtitles.

Application version

1.0.1 (70)

Where did you install the app from?

App Store

Device information

Apple TV 4K 3rd Generation

OS version

TVos 18.1

Jellyfin server version

10.10.0