Trac should not make request to next/related bug
Suppose you are not logged into our Trac bugtracker and have your browser console open while loading #18915 (moved). At the very end you'll oddly see that the follow-up bug #18916 (closed) get requested, too. There is nothing special about this bug. This happens for any bug as far as I can see and Trac should not doing this because I only requested #18915 (moved).
It gets weirder as soon as I am logged in because then the second bug requested is not the one with the following bug number but one that seems related to my activity. Collecting this information seems already a bit overreaching to me but even if we do this for some reason this information should never go over the network (while I am using Trac).
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information