Port page mini graphs not showing when browsing with hostname

i recently setup a dns name for my librenms server (e.g. http://librenms.some.domain:8668) and since switching to using that to access libre the ports page isn’t showing the mini graphs. when browsing the same page via ip (http://192.168.1.147:8668) the graphs DO show …

when checking graph image links in the broken situation (using hostname) the links are all hostname-based except on the ports page it uses the internal IP url.

e.g. overall traffic image link on device overview page:
librenms.some.domain:8668/graph.php?width=1085&height=362&lazy_w=1165&to=1719329100&device=2&type=device_bits&from=1719242700&legend=no

mini graph image link on ports page:
192.168.1.147:8668/graph.php?type=port_bits&id=49&from=1719243000&to=1719329400&width=100&height=20&legend=no&bg=ffffff