I'm facing a similar issue, where the server in my cordova app (server based on https://github.com/zwopple/PocketSocket) actually crashes if a iOS 15 client (iOS 15.0.2 in this particular case) tries to send data.
The error happens here:
// inflate if necessary
if(_pmdEnabled && !frame->control && (frame->rsv1 || _initialFrame->rsv1)) {
(Line 682 of PSWebSocketDriver.m of said library)
The error message marks this as the source of the error: _initialFrame
And this is the error: Thread 30: EXC_BAD_ACCESS (code=1, address=0x9)
I've tested sending messages to the public websocket server test page https://libwebsockets.org/testserver/, mentioned by @DirtyHerri. The connection is established, but if I send data using the "Send Junk" button, the connection is closed, so I guess something similar is happening there. Toggling NSURLSession WebSocket in Safaris experimental features section doesn't have any effect for me.
qpwr
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