Suicide is a heinous crime according to Hindu scriptures (see this thread - What does Hinduism say about Suicide?). Then how come an Acharya (Vallabhacharya) who propounded Shuddhadvaita darshan (Pushti Marga) committed suicide by jumping into the river Ganges in Benaras? You will get to know about this incident from the book "Bhakti Schools of Vedanta" by Swami Tapasyananda.
Lord Rama and Lakshman both committed suicide by drowning in the river Sarayu. One version says that Lord Caitanya - the propounder of Acintyabhedabhedvad darshan - jumped into the ocean in Puri and died. Also, Totapuri, the guru of Sri Ramakrishna, once tried to commit suicide when he was severely ill by drowning in the Ganges. So if suicide is such a heinous crime, then why do so many important Hindu personalities die by drowning?
Is that true that this specific mode of suicide (suicide by drowning) is permitted in Hindu Scriptures?