Anti-spam inbound policy working differently without intervention

Last month, I ran a message trace to see what emails were failing to be delivered due to the spam policy. I had a suspicion that some important emails were not being delivered. After looking at the report, indeed some emails that I had previously received from senders were now failing to be delivered. I have never made changes to the anti-spam inbound policy. I've only added entries to the allowed/blocked senders/domains.

Has Microsoft changed something within the past few months or so that affected the spam priority behavior or anything else? I find it very odd that emails that I've received in the past are now randomly failing to be delivered. Now, I have had to send all spam-detected emails to the Junk email box instead of automatically deleting them, which is not what I wish to do.