I have at home hAP AC2 and hAP AC3 LTE6. Former nicely “reports” (via webfig) the presence of new OS release, downloads change log and all as expected.
OTOH, the hAP AC3 does show the version only of new firmware, but kinda the webfig gets stuck, as changelog is NOT shown (only of the instaled 6.47.1), also the Download button either disappear or simply does nothing.