NoScript logs the full details in the JavaScript console (Ctrl-Shift-J), but my best guess is that FogBugz links hit this higher priority default ABE SYSTEM rule.
# Prevent Internet sites from requesting LAN resources.
# This one guards the local network, like LocalRodeo
# LOCAL is a placeholder which matches all the LAN
# subnets (possibly configurable) and localhost
# Configure more in the about:config, noscript.abe.localExtras option.
Site LOCAL
Accept from LOCAL
Deny
Your WAN IP is also included in LOCAL by default to prevent a specific kind of DNS Rebinding attack. The ordering of the rules matters and the first match wins; thus, moving the Accept from
action into the Site LOCAL
SYSTEM rule might work:
# Allow links on https://SomeCompany.fogbugz.com/ to access internal services.
Site LOCAL
Accept from LOCAL
Accept from https://SomeCompany.fogbugz.com/
Deny
Caveat emptor; you're trusting web pages from an outside company (FogBugz) with access to your internal resources.