SpeechToTextButton: NullReferenceException occurs when rapidly adding and removing the button from the UI

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Last Updated: 09 Nov 2026 09:25 by Martin Ivanov

Martin Ivanov

Created on: 09 Nov 2026 09:25

Category: Buttons

Type: Bug Report

SpeechToTextButton: NullReferenceException occurs when rapidly adding and removing the button from the UI

NullReferenceException originating in the WebView2 API can occur when RadSpeechToTextButton is rapidly added to and removed from the UI, including repeatedly opening and closing windows containing the button. The issue occurs with the default WebView2 speech recognizer.

System.NullReferenceException
at Microsoft.Web.WebView2.Wpf.WebView2Base.<>c__DisplayClass32_0.<<EnsureCoreWebView2Async>g__Init|0>d.MoveNext()