Hi Norous (and Gordon)~
I'm not sure about that specifically, but this talks about DNS prefetch and implications:
SOL13930: DNS prefetching feature on client browsers may negatively impact high availability features of F5 products - https://support.f5.com/kb/en-us/solutions/public/13000/900/sol13930.html?sr=56850567
And this document shows a DNS prefetch example (toward bottom) but pertaining to AAM:
https://support.f5.com/kb/en-us/products/big-ip-aam/manuals/product/aam-concepts-11-6-0/18.html?sr=56850463
Not sure if that helps.
ps