We're hitting an intermittent crash of the EO worker process (EOWP) in our WinForms app (.NET 4.8, Win11):

1. Page A opens a named popup: window.open(url, 'addressPopup', 'popup=yes,width=480,height=520'). We accept it in the NewWindow handler (e.Accepted = true) and host e.WebView with WebView.Create(panelHandle).
2. The popup calls window.opener.postMessage(...) and then window.close().
3. If the user clicks and types in page A within about a second of the popup closing, the whole worker process sometimes dies — every WebView (including page A, which was never closed) gets Closed with Reason = EngineCrash, and Engine.State goes to Stopped.

Faster input after the close makes it more likely, so it looks like a race in popup teardown. Reproduces on 26.1.34 and 26.2.42, worker exe version-matched. On older builds we'd also see Runtime.Exception with "Channel disconnected, Channel_ID = N" at the same moment.

Attached: the CrashDataAvailable payload from a crash today (Message was empty, Data ~41KB), and the LogFileName diagnostic log covering the session through the crash.

Is this known? Happy to provide a repro project if useful.

k sent one. thanks

yes, I can send that on the contact page as well.
Though just double checking, cause I had an automated button in the app that I don't think really worked.
It seemed that it had to come from a keyboard event specifically.
So it was, launch the pop up, fill it out and close, then click on the description textbox and just start typing.