SOLVED: Audio dialogues not working on android client

[TheDreadPirate]

In the Jellyfin app click on your profile icon and then "Client Settings". There will be an option to choose which playback engine you use. Web player or integrated player. You SHOULD be using the integrated player. It sounds like you are currently using the web player, which doesn't properly downmix the audio. The center channel has all the dialogue and isn't being split into left and right.