Hi Andre and Erik,
Sorry but we can not replicate this issue on our end, I’ve tested this both on X and PRO with WP 5.0.1 (latest versions). But no luck, I even tested it on Global Block with Horizontal panel orientation like Erik’s screenshot but no dice.
Please try clearing all your caching features (plugin, server-side, CDN, and browser’s cache) after updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
If clearing caches did not work, please provide us a walk through (perhaps a screencast) on how we can replicate the issue, and provide us the site URL and login credentials in a secure note so we can take a closer look.
Thanks,