I have an AbstractJavascriptComponent inside a tabsheet. This works fine in FireFox, Chrome, and IE. After updating to Vaadin8 (version 8.0.4), the component loads the first couple of times the tab is selected in MS Edge, but eventually a “Could not initialize JavaScriptConnector because no JavaScript init function was found” error is generated. This error does not occur when F12 developer tools are open. Any help would be greatly appreciated.