NEW 231737
Content disappears after screen height 
https://bugs.webkit.org/show_bug.cgi?id=231737
Summary Content disappears after screen height
Mish
Reported 2021-10-14 06:01:31 PDT
Created attachment 441208 [details] Screen recording no adblocker is in use and the issue happens on wikipedia and other sites
Attachments
Screen recording (44.53 MB, video/quicktime)
2021-10-14 06:01 PDT, Mish 		no flags
Details
Another recording of the bug (18.69 MB, video/quicktime)
2021-10-17 06:03 PDT, Mish 		no flags
Details
Search bar overlay when bug is triggered (60.08 MB, video/quicktime)
2021-10-19 13:46 PDT, Mish 		no flags
Details
Sample 1 (221.09 KB, text/plain)
2021-10-23 09:18 PDT, Mish 		no flags
Details
Sample 2 (224.83 KB, text/plain)
2021-10-23 09:18 PDT, Mish 		no flags
Details
Sample 3 (791.86 KB, text/plain)
2021-10-23 09:22 PDT, Mish 		no flags
Details
Sample 4 (230.61 KB, text/plain)
2021-10-24 07:11 PDT, Mish 		no flags
Details
Bug on Safari iOS (1.69 MB, image/png)
2021-10-29 08:36 PDT, Mish 		no flags
Details
Bug on Safari iOS (817.48 KB, image/png)
2021-10-29 08:37 PDT, Mish 		no flags
Details
Bug on Safari iOS (620.58 KB, image/png)
2021-10-29 08:38 PDT, Mish 		no flags
Details
Sample 5 (372.72 KB, text/plain)
2021-10-29 08:38 PDT, Mish 		no flags
Details
Sample 6 (202.22 KB, text/plain)
2021-10-29 08:39 PDT, Mish 		no flags
Details
Sample 7 (4.24 MB, text/plain)
2021-10-29 08:39 PDT, Mish 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2021-10-14 09:33:45 PDT
Do you have Safari extensions installed? Does disabling them fix this?
Mish
Comment 2 2021-10-14 12:37:54 PDT
the bug occurs only occasionally disabling extensions, reloading the page and cleaning cache has no effect, in this broken state only a restart helps also i remember somewhat similar thing happened in PDF files (pages would stop to render), but not sure if it still happens and if it is caused by the same bug will report back when i'm able to trigger it again thanks
Mish
Comment 3 2021-10-17 06:03:38 PDT
Created attachment 441534 [details] Another recording of the bug was having the bug again today, randomly no extensions activated, caches clean
Mish
Comment 4 2021-10-19 13:46:33 PDT
Created attachment 441786 [details] Search bar overlay when bug is triggered when the bug occurs, search bar overlay stays within viewport
Simon Fraser (smfr)
Comment 5 2021-10-19 13:49:59 PDT
When this happens, can you find the PID of the WebProcess for that tab in Activity Monitor, and then run 'sample <pid>' and attach the output?
Radar WebKit Bug Importer
Comment 6 2021-10-21 06:03:02 PDT
<rdar://problem/84504637>
Mish
Comment 7 2021-10-23 09:18:11 PDT
Created attachment 442261 [details] Sample 1
Mish
Comment 8 2021-10-23 09:18:33 PDT
Created attachment 442262 [details] Sample 2
Mish
Comment 9 2021-10-23 09:19:49 PDT
Added some samples from Activity Monitor page: https://shikijs.github.io/twoslash/
Mish
Comment 10 2021-10-23 09:22:09 PDT
Created attachment 442264 [details] Sample 3
Simon Fraser (smfr)
Comment 12 2021-10-25 11:49:27 PDT
None of those samples show anything unusual going on. Mish, what is your display configuration and hardware setup?
Mish
Comment 13 2021-10-25 12:37:16 PDT
macOS Big Sur 11.6 (20G165) MacBook Pro 13 (2017), Two Thunderbolt 3 ports, 2.3 GHz Dual-Core Intel Core i5, 8GB RAM no external display/graphics, resolution set to "Scaled" the bug started happening after Safari got updated to new look
Mish
Comment 14 2021-10-29 08:36:08 PDT
i'm currently noticing same thing on Safari on iOS
Mish
Comment 15 2021-10-29 08:36:54 PDT
Created attachment 442816 [details] Bug on Safari iOS
Mish
Comment 16 2021-10-29 08:37:54 PDT
Created attachment 442817 [details] Bug on Safari iOS
Mish
Comment 17 2021-10-29 08:38:20 PDT
Created attachment 442818 [details] Bug on Safari iOS
Mish
Comment 18 2021-10-29 08:38:59 PDT
Created attachment 442819 [details] Sample 5
Mish
Comment 19 2021-10-29 08:39:17 PDT
Created attachment 442820 [details] Sample 6
Mish
Comment 20 2021-10-29 08:39:48 PDT
Created attachment 442821 [details] Sample 7
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