Actually his last post/comment on his Russian blog was on June 27 2020 and it said (roughly translated):
"There is bad news, in the near future I will have to deal with the funeral of a relative, usually I do not write about such personal things, but since we have known each other for a long time, I do not see anything shameful here to tell you.
Therefore, I will drop out online during this period, and pause the blog comments so do not be surprised if you write something, but it does not appear immediately.
Of course, I will not justify myself, but I just warn you because many were waiting for the update, but I still feel responsibility, so you can only blame and scold me for the postponement of the deadline and consider me a jerk. I will not be offended, as I will close the first question, I will return to the update.
To be sure, I hope to get back to work on the update next week, all health and many years to come."