After the German occupation of Paris in 1940, Jacques Rouché sought to re-open the Opéra and invited Lubin to return to sing Alceste. This was followed by performances of Fidelio and Der Rosenkavalier, and in 1941 she again sang Isolde, this time with the visiting company of the Staatsoper from Berlin under the direction of Herbert von Karajan.
During World War II, Jacques Rouché sought to revive the Paris Opera after Germany occupied the city in 1940. He invited Lubin to return and perform Alceste, which was followed by productions of Fidelio and Der Rosenkavalier. In 1941, Lubin sang Isolde with a visiting company from Berlin's Staatsoper, led by Herbert von Karajan.