Session Replay Incorrectly Shows Page DOM Content Duplicates

[kpc-seth]

Environment

SaaS (https://sentry.io/)

Version

No response

Link

https://kpc-cf.sentry.io/replays/javascript:b4bb3c63380e429a96bcfa8b8ba54143/?project=4504575536201728&query=&referrer=%2Freplays%2F&statsPeriod=14d&yAxis=count%28%29

DSN

No response

Steps to Reproduce

1. Go to replay
2. Play replay
3. Look at window and see data duplicated in scroll (see attached image under Actual Result)

Expected Result

Window should not show duplicates.

Actual Result

[getsantry]

Assigning to @getsentry/support for routing, due by Monday, February 27th at 1:52 pm (sfo). ⏲️

[getsantry]

Routing to @getsentry/replay for triage, due by Tuesday, February 28th at 11:00 am (sfo). ⏲️

[billyvg]

@kpc-seth Can you trying updating to the latest SDK version (7.39.0)?

[kpc-seth]

Done. Issue persists.

[kpc-seth]

Issue persists with version 7.40 as well

[kpc-seth]

Are there any updates related to root cause and/or fix? Thanks.

[billyvg]

@kpc-seth Sorry this has taken awhile, I'm still looking into this - I see that there are some large mutations happening (> 10k) but haven't been able to confirm yet if this is the root cause. Would you be able to provide me with a test account so I can test some potential fixes? My email is billy at sentry.io if so

[billyvg]

getsentry/rrweb#82 should fix the duplicates on the player side, but I would still like to investigate why it is recording duplicate DOM elements.

[kpc-seth]

@billyvg - which test accounts do you need? Access to our Sentry account? Access to our application's test environment to run a use case that reproduces the issue in Sentry? Both? Thanks.

[billyvg]

@kpc-seth Just the latter would be great (access to your application -- it doesn't need to have Sentry or Replay enabled)

[billyvg]

@kpc-seth The replay should now play correctly, but if you could email me credentials for a test account, I would still be interested in investigating this issue from the recording side. Thanks.