you mean Realistically: not Testarossa but TestaDURA (hardhead) aka Rimbambito (Bonehead)Racing incident. Seb technically could move since he was ahead, but realistically should not have without more of a lead. He technically had the slightest lead and protocol allows him some leeway.
Technically: Racing incident. Realistically: Seb is hardheaded.
...I like Seb, but wtFrk!! Maybe he was a tad embarrassed at how his teammate climbed up all the way from the back to match/surpass him. At this pace I wonder if he will finish the 2020 season at Maranello....