Google Chrome has started out an incompatible change regarding the “SameSite” cookie attribute on Feb 17, 2020 but promises to support the Cookie Legacy SameSite Policies at least until February 2021.
See SAP Note 2887651 – Issues with SameSite cookie handling in case of issues with logon or missing content for cross-domain browser integration scenarios, like SAP Analytics Cloud and SAML logon with Google Chrome v. 80 or Microsoft Edge v. 86 and higher.