It is believed that in the aftermath of the death of Rajdhar Manikya I in 1600, some confusion arose in regards to the succession to the throne.
[1] Historian Jai Prakash Singh suggests that the inauspicious horoscope of the old king's heir, Yashodhar, made the nobility hesitant in accepting him as monarch.
It was through such a situation that Ishwar, as well as another individual, Virabhadra Manikya, made bids for the throne, though the former appears to have been more successful.
[1] Alternatively, he may have been Amaradurlabha, the younger brother of Rajdhar, who had been a distinguished veteran of the Arakan wars under Amar Manikya.
[3] He was eventually ousted after a few months of rule in favour of Yashodhar, who had finally found backing from the nobility and formerly ascended the throne.