Unexplainable difference between preview and snapshot

[rmichelena]

I set to watch a website with playwright, and xpath selector.
(in this case: https://www.ungm.org/Shared/KnowledgeCenter/Pages/ICAO
and .element-containing-all-view-documents)

version 0.50.16 but this keeps happening since whatever version was there mid-june I believe...
using docker image ghcr.io/dgtlmoon/changedetection.io + dgtlmoon/sockpuppetbrowser:latest
on a VPS running Ubuntu

So if I look at the Preview in "Edit -> Filters and Triggers" it looks fine.
But the snapshot shows a totally different thing, it kind of captures only partially.
If I create a new watch with same parameters, it'd seem the first time it captures correctly.
But from then on, every check will only capture partial ; or al least is what the "current snapshot" shows.
I did try increasing dwell time to 30 seconds, even 1 minute, but it doesn't make a difference

shared config:
https://changedetection.io/share/1yEnnL0O-2Aa

So in all my other watches, the "Preview" matches the snapshot.
But in this one it doesn't, and then the diff also does not work as it should, because it'd seem for some reason the capture is failing after the very first time, even though the preview keeps looking fine every time.

Screenshots attached.

[dgtlmoon]

shared config:
http://xxxxx:5000/share-url/925831c8-7da8-425a-8400-f5b47abd035a

you're not meant to paste that link!!! please edit the post and remove your private URL

click on the 'share' icon and it will generate a link for you, paste that one :-)

[dgtlmoon]

Do you have any groups with settings attached to the watch?

what about in 'global' filters in main settings?

[rmichelena]

shared config:
http://xxxxx:5000/share-url/925831c8-7da8-425a-8400-f5b47abd035a

you're not meant to paste that link!!! please edit the post and remove your private URL

click on the 'share' icon and it will generate a link for you, paste that one :-)

sorry, edited.

[rmichelena]

Do you have any groups with settings attached to the watch?

what about in 'global' filters in main settings?

The group has no settings, never touched it.
The global only has "ignore whitespace" checked, and default wait 20 seconds, nothing else.

[dgtlmoon]

any chance you're able to attach your backup zip?

[rmichelena]

changedetection-backup-20251012042609.zip

there's the backup ...

[rmichelena]

FYI, in the backup the two watches to look for are "ICAO Concursos" and "new ICAO Concursos", which are actually the same, just that I redid it from zero in case there was some hidden corrupted setting.

[dgtlmoon]

@rmichelena apologies, i think this is the bug #3561 thanks for the reporting

[rmichelena]

could be!
I was just about to set up a new instance with just that watch - if your fix of #3561 does not fix my problem with this watch, I'll let you know.

[rmichelena]

Hey, I've set up a completely new and fresh instance of Changedetection in another VPS
In that instance, I've configured two watches for the offending page:

• one plain Playwright + css selector (.element-containing-all-view-documents), but without "ignore lines"
• the other, same but with "ignore lines" set to:
  /.Expires within./
  /.Displaying results./

the one that does not have the "ignore lines", works fine. Snapshots are fine. It's just that it triggers on the countdowns that I'm trying to ignore.
the one with the "ignore lines", the snapshots are rubbish, and triggers on the lines it's supposed to ignore.
backup attached.
changedetection-backup-20251109214710.zip