Disappearance of the list of current read, already read, and want to read.

How much is the chance that Reading list, I want to read list, and Already read list will be back in no time? Mine is more than 300 on going reads, not sure for I want to read, and already read but one thing is for sure, I cannot remember them all. My bookmark is only one, which makes me sad big time! I read that a lot of users experience the same thing and please can you help me ease this feeling that I needed to go back from the very start because I don't have offline list for me to able to find out if there is/are updates to those stories I am currently reading.

I don't care how long, I am alright as long as there is a little bit assurance that those list will be back. Please give me some good news.