Coincidentally, I just received a complaint about this behavior myself... We are running DSpace v5.10 and xmlui as well. The withdrawn items are in google search results and the link in google is to the Request a copy page. This explains how the user is able to obtain the link to the Request a copy page, but it doesn't explain why, since the records were never embargoed to begin with.
I haven't investigated this any further, but I seem to recall that withdrawn items are still discoverable, but are they still crawled (or placed in sitemaps)? How are they interpreted as embargoed? I'll be digging a little deeper, since this is highly undesirable behavior, but has anybody else noticed this?
~~ Bill
Human wheels spin round and round
While the clock keeps the pace... -- John Mellencamp
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Bill Tantzen University of Minnesota Libraries
612-626-9949 (U of M)
612-325-1777 (cell)