It was the same when I docked there to sell Data.
IMHO this might have to do with UC Routines scanning for Systems that are <20LY due to the extreme System density there, although I could be wrong.
But I have no other explanation as to why it takes a very considerable time before any Page loads to sell.
In that regard, the place is rather unique.
PS.
I also noticed there that the "Buy UC Data" function is basically non-functional.
That, however, I credited it to the entire area possibly not being properly tagged/scripted as "Inhabited Space".
(I didn't find a single POI on Planets anywhere near it, also AFAIK dropping out of SC i.e. in Rings didn't produce any of the usual NPC spawns - making me think the spawn scripts across the board treat this entire area as "uninhabited - Deep Space >500LY")
Just my theory - but it's the only one I had and it all seemed to point that way.