why might nmap on a computer be reporting port 443 as closed on some but not all computers?

Question

When I run nmap event-bridge.twilio.com on roughly half the computers in my network I get this:

PORT    STATE   SERVICE
443/tcp closed  https

When I run it on the other half of the computers in my network I get this:

PORT    STATE SERVICE
443/tcp open  https

I installed Wireshark to capture the packets and on the computers that have the issue the computer sends a SYN request and the server responds with RST but on the computers without the issue the server responds with SYN/ACK (which I'd expect).

I updated the hosts file one of the computers with the issue to point to the same IP address that one of the computers without the issue was using for event-bridge.twilio.com and that didn't help.

Neither the router or firewall have any rules blocking event-bridge.twilio.com so I'm at a loss. And the fact that it's only half the computers is leaving me pretty perplexed.

Any ideas?