The string following “&” was interpreted as a character reference. (“&” probably should have been escaped as “&amp;”.)
गाहायनि स्ट्रिं “&”खौ हांखो रायखांनाय बादि बेखेवबाय। (“&” खौ जानो हागौ “&amp;” बादि एसकेप खालामनांगोन।)