In v3, on both a new Windows 10 PC and an Android 7.0 phone, when I click on any menu item, the page will redirect to a page that has recently been displayed rather than the page of the link that I have clicked on. If I click on the menu item repeatedly, eventually it gets to the appropriate page.
On the same Android phone, it seems to be impossible to scroll or resize within the 'Insert chess game or diagram' dialog box. Under the Chrome browser's Settings - Accessibility, I activated 'force enable zoom.' I can resize most chess.com pages by pinching to zoom, but once I get into the diagram dialog box, this no longer works. It appears that the dialog box has been coded to be of a fixed size, and to disable scrolling.
On any of the browsers available on an Ipad 2 iOS 9.3.5 (Safari, Chrome, Firefox, Dolphin), chess.com's Messages and chessboards are not displayed.