Possible memory leak when refreshing the page

[yaustar]

On iOS 16.3.1, refreshing a page multiple times will eventually cause a black screen on load and the page is locked. To load more WebGL content, the user must quit Safari and start it again.

Example. See top of the screen where we have content rendered until the last refresh where it's just black
https://user-images.githubusercontent.com/16639049/227916963-acbe769a-5898-425f-8ab4-a77951382b3a.mp4

Build: https://playcanv.as/p/S2r8lFwv/

Forum post: https://forum.playcanvas.com/t/ios-ipados-16-3-webgl-via-metal-feature-issue/30242/
Possible related issue in the Editor: #998

[yaustar]

Tried to reproduce on three.js examples and have been unable to so far.

Also interestingly, I've been unable to reproduce with https://playcanvas.github.io/#/graphics/lights-baked-a-o

Maybe it's a hosting issue somehow on PlayCanvas.com/playcanv.as?

[yaustar]

I've uploaded the same build that crashes the tab to https://yaustar.github.io/test-16.3.1-vConsole/

And that doesn't cause the tab to crash which feels more like an infrastructure issue somehow?

[willeastcott]

Can you repro this if you use the embed links? So: https://playcanv.as/e/p/S2r8lFwv/

I'm wondering if it's related to the iframe.

[yaustar]

The OP in the forum said it still crashed, but I couldn't get the iframeless version to crash myself.

[LeXXik]

Just before crashing out of memory, my debugger paused here. It was after a refresh, almost immediately after app loaded and I had a few frames on screen. Might not be related, but adding here anyway:

[LeXXik]

Another one, crashing right after refresh. This time stopped at draco Wasm. Heap was at around 4 Gb.