To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.
Are you still experiencing problems with the latest 8.1 pre-releases (e.g. 8.1.0.rc2)? I believe some issues have been fixed, but if you still have problems, please create an issue in https://github.com/vaadin/framework/issues with instructions on how to reproduce the issue.