You cannot choose nodes on Hive.blog, but this is on the list of things to add in the future.

I do highly recommend peakd, it is better in every way and allows you to change nodes as needed. Even if you only use it when you have problems with Hive.blog, I think you will have a better experience.

I am not sure what node Hive.blog uses, I believe it swaps off a couple of nodes, Anyx being one of them and could explain your issue (yesterday only as I haven't seen any problems prior, but I don't use the default Hive node).