PNG info is actually broken with some larger workflows. I'll look into it, but I'm not sure we can do something about it. For example, this workflow (it's in the metadata of the image):

Found a fix. The webui needs to fix their png info parsing with this regex instead:

\s*([\w ]+):\s*("(?:\\.|[^\\"])+"|[^,]*)(?:,|$)

https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/68f336bd994bed5442ad95bad6b6ad5564a5409a/modules/generation_parameters_copypaste.py#L12

We can patch this line from the extension for the time being.