I have a weird error if I use a variable called `br`: Video: https://user-images.githubusercontent.com/52289/157880953-501fe517-4776-4720-a669-b3e32c398819.mov Notebook: [mobius-pluto.jl.zip](https://github.com/fonsp/Pluto.jl/files/8232441/mobius-pluto.jl.zip) I haven't tried all the two letter variable name possibilities but I have a sneaking suspicion that it's something to do with HTML...