this post was submitted on 21 Jan 2025
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Tesseract

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Tesseract: An Advanced Lemmy Client

The goal of Tesseract is to address as many things in Lemmy that annoy me as I can. I also trawl various "is there any way to [blank] in Lemmy?" posts to get feature ideas. Both of those lists are pretty extensive, so Tesseract has accumulated quite a few features.

Github: https://github.com/asimons04/Tesseract/

Hosted / Demo Instance: https://tesseract.dubvee.org/

Note that the hosted instance defaults to Lemmy World, but it is unlocked to be able to connect to any Lemmy server.

Announcements, support, and guidance for the Tesseract UI.

All instance rules apply here. Beyond that, just be civil and constructive.

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[Bug][v1.4.29] Feed sometimes skips a whole load of entries (feddit.org)
submitted 1 week ago by Lucki@feddit.org to c/tesseract@dubvee.org
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When scrolling through the feed it randomly happens to skip a bunch of entries. It suddenly jumps far down the feed for no apparent reason.

Some observations and possible cause thoughts:

  • I believe it skips one load batch (20) of entries.
  • Scrolling up those entries gets me back to where I was in the feed.
  • I think it happens when the last entry of a previous load batch expands an attached media item.
  • It's more apparent in media heavy feeds.
  • It's independent of the scroll speed.
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[–] ptz@dubvee.org 2 points 1 week ago* (last edited 1 week ago) (4 children)

Thanks for the additional info. When I switch to my other PC, I'll try to do a run through against feddit.org, scaled sort, with all the options you had set. Hopefully I can reproduce it.

It looks the same except the lower two options are missing for me.

Yeah, Feddit.org is on 0.19.5 and those two options require 0.19.7 or higher, so they're hidden/disabled.

I'm hoping the issue is just with the embeds enabled in the feed. Like I said, that's been deprecated and I rarely test in that configuration. I also have some memory hacks in place that turn those back into thumbnails when they're out of the viewport, so maybe there's a bug in that process when embeds are 'always on'?

If that does turn out to be the case, then the good news is it'll be fixed in 1.4.30 since everything is click-to-play.

Edit: I think I was able to see what you're referring to. It only did it once for me (and I had matched your settings), but I believe I can confidently say that the issue does exist. So, that's progress.

Hypothesis is that when the infinite scroll buffer overflows and it pops the oldest entries from the beginning of the feed, there's some weird behavior with FF (I don't think I've seen this on FF mobile, though).

Will keep testing and see if I can pin that down as the cause or rule it out.

[–] Lucki@feddit.org 2 points 1 week ago (2 children)

I think I was able to see what you're referring to.

Here is a video demonstrating the jump/skip:

VideoVideo

[–] ptz@dubvee.org 1 points 1 week ago* (last edited 1 week ago) (1 children)

Thanks. I believe that's what I saw, though I could only trigger it once.

I think I know where the problem is, and I've made some changes in 1.4.30 that should address that if I'm right.

Unfortunately, 1.4.30 is a little behind schedule because I wanted to take the opportunity to re-write and clean up the rendering pipeline for the different post media in addition to my other "to do" items and bugfixes. That said, I'm going to have to wait until those are finished before testing the fix properly.

If you'd be willing to run a beta, I can give you a shout when I'm putting the final touches on the next release and you can let me know if that addresses the issue for you. Probably be about a week from now, give or take a few days.

In the mean time, if it gets to be too annoying, the only workaround I can think of would be to disable infinite scroll, set the posts per fetch to 30, close the tab, and relaunch (there's a known quirk when togging infinite scroll).

[–] Lucki@feddit.org 2 points 1 week ago

All good, take your time :) While it is annoying, the posts don't get marked as already seen which means they just reappear somewhere in the future.

If you'd be willing to run a beta, I can give you a shout when I'm putting the final touches on the next release and you can let me know if that addresses the issue for you.

If I can pull the beta in via a podman tag, I'll happily give it a try. Not sure if this issue would be a blocker though, as it doesn't seem to be super common for anyone else.

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