The low hash rate happened a week back was due to there was a big mining farm that closed operation suddenly which made the hash rate very low, but if it was true, then this is definitely one of the factor that contributed to its down trend but fortunately we are bouncing back to another peak in terms of hash rate but prices of bitcoin yet to bounce back.
we are not bouncing back because to do that we first have to had gone down but the hashrate never dropped at all. what we saw was a bug in some shitty block explorer called blockchain.info that reported false values for hashrate then the news sites filled the internet with their FUD about how hashrate has dropped they even went as far as publishing some fake pictures showing some fake thing that was burnt!