@tomashora Thank you for reporting this issue. We are working on resolving it. It's actually part of a larger work piece that is taking place to optimize etcher-on-etcherPro experience, although at the moment we don't have an ETA on the solution.
I can confirm that the User Interface is very sluggish when selecting a WiFi network and then entering username/password. While this pop-up is sluggish, the "Sleep" icon in the top-left still seems responsive.
@tomashora Thank you for reporting this issue. We are working on resolving it. It's actually part of a larger work piece that is taking place to optimize etcher-on-etcherPro experience, although at the moment we don't have an ETA on the solution.