HLS Interstitial behaviour when user JUMPS across more than one interstitial

[matthardiman-itv]

Have you read the FAQ and checked for duplicate open issues?
Yes

If the problem is related to FairPlay, have you read the tutorial?

Not DRM related

What version of Shaka Player are you using?

v4.12.2

Can you reproduce the issue with our latest release version?
Yes

Can you reproduce the issue with the latest code from main?
Yes

Are you using the demo app or your own custom app?
Demo App ( https://shaka-player-demo.appspot.com/ )

If custom app, can you reproduce the issue using our demo app?
n/a

What browser and OS are you using?
Windows 11 & Chrome 131

For embedded devices (smart TVs, etc.), what model and firmware version are you using?
n/a

What are the manifest and license server URIs?

Manifest https://d246vxj7zy7k76.cloudfront.net/bbb/main_is.m3u8 which includes 3 midroll asset lists - https://d246vxj7zy7k76.cloudfront.net/adlists/list_midroll1.json https://d246vxj7zy7k76.cloudfront.net/adlists/list_midroll2.json and https://d246vxj7zy7k76.cloudfront.net/adlists/list_midroll3.json

What configuration are you using? What is the output of player.getNonDefaultConfiguration()?

Default

What did you do?

Created an HLS packaged asset using Shaka Packager, Edited the media manifests to add 5 Interstitial links (1 pre-roll, 3 mid-rolls and 1 post-roll)
#EXT-X-DATERANGE:ID="PREROLL",CLASS="com.apple.hls.interstitial",CUE="PRE",START-DATE="2020-01-01T00:00:00.000Z",X-ASSET-LIST="https://d246vxj7zy7k76.cloudfront.net/adlists/list_preroll.json",X-RESUME-OFFSET=0.0,X-RESTRICT="SKIP,JUMP"
#EXT-X-DATERANGE:ID="1",CLASS="com.apple.hls.interstitial",CUE="ONCE",START-DATE="2020-01-01T00:02:00.000Z",X-ASSET-LIST="https://d246vxj7zy7k76.cloudfront.net/adlists/list_midroll1.json",X-RESUME-OFFSET=0.0,X-RESTRICT="SKIP,JUMP"
#EXT-X-DATERANGE:ID="2",CLASS="com.apple.hls.interstitial",CUE="ONCE",START-DATE="2020-01-01T00:04:00.000Z",X-ASSET-LIST="https://d246vxj7zy7k76.cloudfront.net/adlists/list_midroll2.json",X-RESUME-OFFSET=0.0,X-RESTRICT="SKIP,JUMP"
#EXT-X-DATERANGE:ID="3",CLASS="com.apple.hls.interstitial",CUE="ONCE",START-DATE="2020-01-01T00:06:00.000Z",X-ASSET-LIST="https://d246vxj7zy7k76.cloudfront.net/adlists/list_midroll3.json",X-RESUME-OFFSET=0.0,X-RESTRICT="SKIP,JUMP"
#EXT-X-DATERANGE:ID="POSTROLL",CLASS="com.apple.hls.interstitial",CUE="POST",START-DATE="2020-01-01T00:20:00.000Z",X-ASSET-LIST="https://d246vxj7zy7k76.cloudfront.net/adlists/list_postroll.json",X-RESUME-OFFSET=0.0,X-RESTRICT="SKIP,JUMP"

The midrolls are at 02:00, 04:00 and 06:00 minutes into the content.

What did you expect to happen?
If the user is currently playing at a time before the first mid-roll (e.g. 01:00) and then changes the player location to after the last mid-roll (e.g. 07:00), I would expect only 1 mid-roll to play - not 100% sure which one, probably the first but not all 3.

What actually happened?

When the user is at a playback location before the first mid-roll (e.g. 01:00) and they move to a point after the last mid-roll (e.g. 07:00) all 3 mid-rolls play - starting with the 3rd, then the 2nd and finally the 1st

Are you planning send a PR to fix it?
unfortunately I don't have sufficient knowledge to offer a PR