Update nodebb-plugin-rainbows, it should work now.
How to follow a topic in Lavender
I remember there were an option in Vanilla theme to receive notification from any topics by clicking on the "eye" icon.
I can't see any of this in the Lavender theme. Is it hidding somewhere?
It's under the favourite menu.
Yes, silly me. Noticed that but you've been quicker on the screenshot posting