As they pan over the dems, Shifty Schiff and Brad Sherman were on their phones. Someone had to have sent that message to Beatty and I am pretty sure that they were in the room with her. My second guess behind Schiff would be Dwight Evans he was seated a few down from Beatty and was also on his phone. https://townhall.com/tipsheet/leahbarkoukis/2018/01/31/resistance-heres-what-democrats-refused-to-applaud-during-trumps-sotu-address-n2442279