They are slow. Their default due date is 4 days prior to the day of the month when you applied for the card.
Then if new to Chase they put a hold on your payment for 5 business days until it clears. If not it posts on the due date but I have to check with the bank to see when the payment clears (often 2 business days).
Official travel point totals as of 10/21/24 (1,358,177 Total Points)
Chase Ultimate Rewards 696,884 | IHG One Rewards 144,957 | Hilton Honors 144,521 | AMEX Membership Rewards 102,729 | World of Hyatt 76,095 | Marriott Bonvoy 65,343 | Citi Thank You 38,153 | Choice Rewards 32,460 | United MileagePlus 13,316 | British Airways Avios 12,333 | Jet Blue TrueBlue 11,780 | Wells Fargo Rewards 2,858 | Southwest Rapid Rewards 2,447 | NASA Platinum Rewards 1,883 | AA Advantage 1,744 | Navy Federal Rewards 1,087 | Delta Sky Miles 175 | Virgin Atlantic Virgin Points 100 | Lowes Business Rewards 7,102 ($71.02) | Amazon Rewards 2,200 ($4.75) | Discover CB 10 ($0.10)