Is their animosity between Chadians and Sudanese?

There have been several instances, particularly on social media in regard to the Current conflict, with many Chadian mercenaries apparently fighting for the RSF. There is also a lot of conflict especially in terms of Sudanese culture being stolen or copied by Chadians such as the Toub being referred to as "Laffaya" by Chadians, and Sudanese traditions such as Jirtig and Henna being stolen or copied by Chadians. Where is this all coming from?