I just updated to Node-RED v2.2.0 and also updated dashboard to v3.1.5 on my raspberry PI 4. After the update I got warnings each time I deployed that I have some nodes that are not properly configured. It´s only ui_spacer nodes. If I delete the spacer nodes in a flow the problem is gone, but if I change the layout on my dashboard again by moving one or more ui_nodes the warning with the ui_spacer nodes is back.
After the update I also got 160 ui_spacer nodes under the config tab on a flow that´s not even on my dashboard.
Does anyone have a solution to this? 
