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Safari: Messages fail to auto-scroll, rooms may not connect on first visit, and sent messages don't appear until navigation #236

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opened 2026-04-18 13:34:05 +00:00 by userAdityaa · 6 comments
userAdityaa commented 2026-04-18 13:34:05 +00:00
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Three Safari-specific issues:

  1. Auto-scroll breaks: Safari doesn’t support overflow-anchor with column-reverse, so new messages push the viewport up instead of staying pinned to the bottom.

  2. Room fails to load initially: onMount captures a stale cleanup function, so subsequent start() calls don’t register teardown properly, leaving a broken feed subscription.

  3. Sent messages delayed: Messages are optimistically added, but not shown until relay confirmation; Safari’s slower WebSocket timing delays this, causing them to temporarily disappear.

Screenshot 2026-04-20 at 7.48.30 PM.png

Reproducing: Use Safari (macOS or iOS). Open any space room or space chat. Send a message or wait for an incoming message. The viewport does not stick to the bottom, and sent messages may not appear.

Three Safari-specific issues: 1. **Auto-scroll breaks:** Safari doesn’t support `overflow-anchor` with `column-reverse`, so new messages push the viewport up instead of staying pinned to the bottom. 2. **Room fails to load initially:** `onMount` captures a stale cleanup function, so subsequent `start()` calls don’t register teardown properly, leaving a broken feed subscription. 3. **Sent messages delayed:** Messages are optimistically added, but not shown until relay confirmation; Safari’s slower WebSocket timing delays this, causing them to temporarily disappear. <img width="1439" alt="Screenshot 2026-04-20 at 7.48.30 PM.png" src="attachments/9cdbb500-d9b2-4dc0-a1d0-db5e903a4673"> <video src="attachments/7b434464-5427-430e-bba4-fcae8a24fdaf" title="Screen Recording 2026-04-18 at 7.02.53 PM.mp4" controls></video> Reproducing: Use Safari (macOS or iOS). Open any space room or space chat. Send a message or wait for an incoming message. The viewport does not stick to the bottom, and sent messages may not appear.
Screen Recording 2026-04-18 at 7.02.53 PM.mp4
714 KiB
Screenshot 2026-04-20 at 7.48.30 PM.png
469 KiB
userAdityaa commented 2026-04-18 13:34:19 +00:00
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@hodlbod , this doesn’t appear to be intentional behavior, is it?

@hodlbod , this doesn’t appear to be intentional behavior, is it?
hodlbod commented 2026-04-18 13:45:51 +00:00
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No, this is a bug. It works in firefox at least, what browser is this?

No, this is a bug. It works in firefox at least, what browser is this?
userAdityaa commented 2026-04-18 13:49:25 +00:00
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No, this is a bug. It works in firefox at least, what browser is this?

the recording is from safari.

it's working fine in firefox, chrome for me.

> No, this is a bug. It works in firefox at least, what browser is this? the recording is from safari. it's working fine in firefox, chrome for me.
userAdityaa added the dev label 2026-04-20 13:37:58 +00:00
userAdityaa changed title from Chat Messages Don't Auto-Scroll Into View to Safari: Messages fail to auto-scroll, rooms may not connect on first visit, and sent messages don't appear until navigation 2026-04-20 13:41:57 +00:00
userAdityaa commented 2026-04-20 13:46:02 +00:00
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Reworded the title and description to indicate the issue seems Safari-specific.
Will push the fix shortly.

Reworded the title and description to indicate the issue seems Safari-specific. Will push the fix shortly.
hodlbod commented 2026-05-06 16:28:40 +00:00
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Fixed in c6b0799b

Fixed in c6b0799b
hodlbod commented 2026-05-06 16:32:01 +00:00
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Also 99fe0e54 fixes the stale cleanup function (good catch)

Also 99fe0e54 fixes the stale cleanup function (good catch)
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Reference: coracle/flotilla#236
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