Even this list itself shows such an example. It calls out the expression "calling a spade a spade" as problematic, and the explanation given is "Although the term has its origins in Greek literature, the subsequent negative connotations with the word "spade" means that the phrase should be used with caution or not at all.". So they are inventing some redefinition of the phrase that could be problematic in order to jettison it.
Note: as a non-native speaker, I have no idea what is problematic about the word "spade". I have only ever seen it to mean either a tool for digging or a type of sword, but I will take them at their word that it does have some other meaning.
This is why lists like this exist. I’m aware of the term and it’s derogatory use. I can see how when used in a professional context it could be harmful. But many people might not be aware, so this list helps build awareness.
Note: as a non-native speaker, I have no idea what is problematic about the word "spade". I have only ever seen it to mean either a tool for digging or a type of sword, but I will take them at their word that it does have some other meaning.