At the risk of putting on my tin foil hat, maybe they’re worried about Trump making a speech or Biden conceding if they call balls and strikes, and riots breaking out.
PA results as of 2234 EST:
https://electionreturns.pa.gov/
BIDEN, JOSEPH ROBINETTE JR
(DEM)
39.74%
Votes: 1,154,158
Election Day : 574609
Mail : 576869
Provisional : 2680
Runningmate: KAMALA D HARRIS
TRUMP, DONALD J.
(REP)
58.99%
Votes: 1,713,438
Election Day : 1419252
Mail : 291975
Provisional : 2211
Runningmate: MICHAEL R PENCE
JORGENSEN, JO
(LIB)
1.27%
Votes: 36,832
Election Day : 27657
Mail : 9112
Provisional : 63
Runningmate: JEREMY SPIKE COHEN
BYE-BYE BUY-DUNG! LESS THAN 40%!