The vendor has published 1 unique mention(s) for this bug: 1. The thumbnail preview will not display in the foreground when you hover over an app’s thumbnail preview (for example, from the task bar) if Browser Content Redirection page, MTOP, UC SDK or RAVE window is overlapping it. Latest urls for this bug: 1. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2507-ltsr/whats-new/2507-ltsr-initial-release/fixed-issues