Restart in Troubleshooting Mode (Help → "Restart in Troubleshooting Mode…”), which temporarily disables all plugins. If that fixes it, you'll need to identify the plugin that's causing it and then report the problem to the plugin's developer.
If not, we'd want to see a Report ID to start and a link to a PDF where you're seeing this.
Upgrade Storage
If not, we'd want to see a Report ID to start and a link to a PDF where you're seeing this.