Hey, Thanks for reporging this. I've tried to reproduce the issue using plotly 5.20.0+dfsg-1. (I uploaded to unstable this version today) However, I was able to create a waterfall chart with the snipped you have shared. (See the attached screenshot)
Could you verify if you're able to render the waterfall chart in this version? Thanks! --- Josue Ortega «Happy Hacking»
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