liveTracker.liveCurrentTime() jitters backwards during live playback #9157

Environment

• Video.js version: 8.23.7
• videojs-http-streaming (VHS) version: 3.17.4
• Browser: Chrome / safari / edge / samsung / lg
• Stream type: HLS / DASH

What's happening

When calling liveTracker.liveCurrentTime() repeatedly during a live stream, the returned value fluctuates and occasionally goes backwards by 2–3 seconds.

Example of values observed over time:

1583
1584
1585
1582  ← goes backwards
1583
1584

This causes issues when calculating the live edge offset (seekableEnd - seekRanges.start(0)), making UI elements like a live indicator or progress bar jump around.

Code

const liveTracker = (player as any)?.liveTracker;
const seekableEnd =
    liveTracker?.isLive?.() && liveTracker?.liveCurrentTime?.()
        ? liveTracker.liveCurrentTime()
        : seekRanges.end(0);

// This value jitters 2-3s backwards randomly
const offset = seekableEnd - seekRanges.start(0);

Current workaround

I'm using a rolling average + backward-drift guard on the client side to smooth the values, but this feels like it should be handled inside liveTracker itself.

Question

Is this expected behaviour from liveCurrentTime()? Is there a more stable public API to get the live edge without jitter? Or is there a known fix/config option I'm missing?