HTC One X - Webview becomes white/empty after touch

I've an Android application which has text box for search, some buttons, webviews (1 visible 2 invisible) and an admob adview. the app just searches on some special sites and it works great on emulator, samsung galaxy devices. but I've issues with HTC One X (don't know about other HTC models). The problem is, when you click a search button, the webview loads the page. then "sometimes" when you try

[perezvon]

HTC OneでWebViewを使っているアプリをタップすると画面が白くなる問題