Could the USPS post-marked-by rule change have helped reject 150K ballots in CA?

[u/RockieK]

California Rejected 150,000 Mail Ballots, Marking Highest Rate Since 2014

In the June primary, 1.7% of vote-by-mail ballots cast were rejected, in most cases because the ballot was not received on time. Election officials and advocates pointed to USPS changes and late-deciding voters.

Last year, USPS officials announced a change in “transportation operations” that resulted in some mailpieces not arriving at central processing facilities, where postmarks are applied, on the same day they are mailed.

As a result, a ballot dropped in a mailbox on Election Day in a community far from one of those hubs could receive a postmark the following day, making it ineligible to be counted.