Hey there,
I read on heptapod that I should come here :D
I've opened this issue quite some months ago:
There is a input document in which I insert data. Some of the data should be conditionally formatted.
As you can see, the file does have the rules in it but somehow they are not "activated". I have to open each rule and as soon as I apply the non-existing changes, the formatting will be applied.
I will have to do this for each rule, so it's driving me mad.
Hopefully anyone here had the same problem. Btw in LibreOffice it just works. So I think this might be a bug in openpyxl.
Regards!