I don't know which version 8.1 is since I don't use apple, but I assume it equals Yosemite.
We have started to get reports since yesterday that safari in Yosemite doesn't work with our maps. Right now I can not do much more than recommend another browser, chrome for example. But I don't know if that is a choice on ipad.
We will of course investigate this, but I expect it to take at least one week, probably more.
UPDATE 2014-10-30 19:30 UTC:
A few hours ago we released a fix that we think should work. We have only tested it in one Safari this far though. It didn't work in that Safari before the fix, but worked afterwards.
We have also learned that it was more than Yosemite that was affected.