RESOLVED FIXED 239543
[model] 3D objects that are hidden on SceneStart action are visible for a few frames on macOS 
https://bugs.webkit.org/show_bug.cgi?id=239543
Summary [model] 3D objects that are hidden on SceneStart action are visible for a few...
Thomas Kumlehn
Reported 2022-04-20 07:47:04 PDT
Safari Preview 143 on macOS 12.3.1 (21E258) on a macMini M1 Try https://kreativekk.de/wp-content/uploads/ar/_xA_CNC_example.html I didn't see this "flashing" with prior combinations of Safari TP and macOS.
Attachments
Should look similar to this (1.08 MB, image/png)
2022-04-29 13:03 PDT, Thomas Kumlehn 		no flags
Details
screenrecording (305.93 KB, video/quicktime)
2022-05-03 04:12 PDT, Thomas Kumlehn 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2022-04-27 07:48:12 PDT
<rdar://problem/92396803>
Smoley
Comment 2 2022-04-29 09:55:31 PDT
The test case loads a mostly blank page for me on STP 144, Chrome and Firefox. Is there something wrong with the test case?
Thomas Kumlehn
Comment 3 2022-04-29 12:49:54 PDT
The Page needs the HTMLModelElement feature activated. Still loads on iPadOS15.5 beta 3 Safari. I only have access to TP143
Thomas Kumlehn
Comment 4 2022-04-29 13:03:56 PDT
Created attachment 458603 [details] Should look similar to this
Thomas Kumlehn
Comment 5 2022-04-29 13:06:15 PDT
The test case only provides a source of type USDZ, no other format
Thomas Kumlehn
Comment 6 2022-05-03 04:12:22 PDT
Created attachment 458731 [details] screenrecording
Thomas Kumlehn
Comment 7 2022-05-03 04:14:10 PDT
macOS 12.3.1 (21E258) with STP 144 still shows the delayed execution of Scene start behaviour. See black text panels flashing up on page reload in the uploaded screen recording.
Thomas Kumlehn
Comment 8 2022-05-12 03:00:31 PDT
Problem persists with STP 145 on macOS 12.3.1 (21E258)
Thomas Kumlehn
Comment 9 2022-06-07 00:35:24 PDT
seems fixed in iPadOS16beta
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