chronyd not responding to some hosts

I have a vanilla install of CentOS 8 ad am using it as an NTP server with Chronyd. It is silently refusing to answer a host on its own network, but it *will* answer another host I have tested off network: On the left, a host on its own network. Asking it repeatedly for response and it sending nothing. On the right, a host off network that syncs without problem. I have not configured any sort of ACL nor set any settings on chronyd other than to set an upstream NTP server. I just don't have any idea why it would respond to one but not the other.