After the SailfishOS update 1.7.0.18 two weeks ago I experienced a drain once, quite possible that it was connection related. No Mitakuuluu for a night and after that no more battery drain.

With a functioning networking connection - ssh to the jolla, Mitakuuluu doesn't sent a message straight away; bug filed: https://github.com/CODeRUS/mitakuuluu2/issues/155

I have experienced this behaviour several times.