I'm seeing a pattern here....I too usually "send to Intuit...", "sent to the agency" and "successfully processed..." a federal tax form all within a 4-5 hour window. 

HOWEVER, I TOO have my Form 941 4th Qtr 2021 "Sent to Intuit for Processing" on 1/2/2022 at 3:45 p.m. EST.....and there it still sits. 

Should I mail a hard copy in the mail to be sure it gets to the IRS timely? 

All payments were sent & processed within the same minute successfully over the last quarter.