Subtitle offset occurs during playing

I mounted my plex server through Infuse, but recently I found that when playing videos on Infuse, the subtitles are offset, sometimes faster and sometimes slower. Whether it’s embedded or external, ASS or PGS, this problem exists on Infuse; By using software to check frame by frame, it was found that the subtitles and video frames correspond, and there is no such problem on other players (including MPC, MPV, Plex). It can be clearly seen from the pictures that the subtitle display is abnormal. The movie is 《君の名は。》. I hope someone can test whether this problem also exists. I will upload the subtitle as an attachment.

Related equipment:
iPhone15pro IOS17.5.1 infuse pro7.8(4860)
Apple TV 4K 2022 tvOS17.6(21M71)infuse pro7.8.1(4924)


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After testing, if the {\ move} parameter appears in the ASS subtitle, there will be an abnormality in the playback timeline of this line on Infuse

I think we both might have the same problem or maybe a different one.

There’s an issue with the player when handling SSA/ASS subtitles on tvOS, particularly with English subs that move dynamically in anime. I’m not referring to regular dialog subtitles that update every few seconds, but rather “sign” subtitles that follow the position of text or objects on the screen. For example, if there’s Japanese text on a piece of paper and the camera moves, the subtitle is supposed to follow the position of that text. However, the player often struggles to update the subtitle position in sync with the movement, causing the subtitle to lag behind or not stay aligned with the original text.
This misalignment disrupts the viewing experience, especially in scenes where the positioning is crucial.

In my case, Infuse is connected to Jellyfin.