I spent a couple hours yesterday fighting with a code signing issue. Didn't know what was going on since I didn't change anything lately. Thought maybe it was some Xcode 26.5 issue or Mac 26.5. Eventually tried on a different machine and it worked.
After tons of digging into it turned out to be an MTU issue when requesting Apple code sign and it chooses IPv6 instead of IPv4. Still don't really know which bit is wrong, but ended up changing enough settings that it worked.
