Have the correspondence analyses disappeared?

Lichess has updated quite a few features recently. I've just looked at my correspondence games which are in progress, to find that all the lines which I'd made on an analysis board (by moving pieces here and there) have disappeared now. Luckily I more or less remember the lines which are still relevant, but reconstructing lines which I analyzed a few weeks ago could be a problem. (Not that it would be so important, but I intend to analyze the games once they finish, and there's no guarantee that I'll remember my reasoning behind some decisions then.) I'm wondering if I'm the only one to face this problem. Have your analyses also disappeared in a similar way?

Yes, I had saved some variations in my games, and now they're gone, don't know whats wrong tho-.

It still works with my account...

@Schiffskoch said in #3:
> It still works with my account...
I didn't mean statistics. By analysis I mean variations which didn't happen or haven't happened yet. I looked at many of them, and they are no longer there.

I understand the problem, but I have never had any trouble. No idea what happened with you two.

Analysis board variations are persisted in your browser local storage. If you clear it, they'll be gone.

You can add your game to a study using the analysis menu to permanently store variations, arrows, and comments.

@ILikeBlitz I enjoy the irony of your concern over the deep a posteriori analysis of correspondence games with this username.

otherwise if using Lichess Tools extension for chromium browsers, one can copy the whole user tree as PGN. and save to text file. as backup. That PGN can also be reimported in either standalone analysis, or studies (more permanent, but older feature set about variation context menu operations with branches of degree more than 2).

I think that, post game, one can also save the whole PGN, or is that only saving the server side PGN of the game?
One has to use the import to study and there export the chapter PGN to get it all?

hypothesis or guessing what might explain (I do have some clues, crumbs of knowledge but not complete).

I think there are 2 types of internal data structure at play, one for server, and one for local browser. The local browser can persist until transfer to study mechanism can merge it to server internal format (via study), I induce with my crumbs of knowledge and experience. It is relatively recent and welcome that one can have own correspondance past thinking not sent as game moves, kind of why one might enjoy correspondance, to taste if wanting it, more than one game within a single game (a long time scale commitment, makes the games less run of the mill game churning, blur in memory perhaps).

@lecw said in #7:
> @ILikeBlitz I enjoy the irony of your concern over the deep a posteriori analysis of correspondence games with this username.
Correspondence chess can also be played in blitz speed. Moreover, I'm close to quitting this time rate. I mostly play blitz here. By the way, a user ILikeBullet also mostly plays blitz here.

@thibault said in #6:
> Analysis board variations are persisted in your browser local storage. If you clear it, they'll be gone.
>
> You can add your game to a study using the analysis menu to permanently store variations, arrows, and comments.
Thanks! It might have indeed happened and its proximity to the latest Lichess upgrade might have been a coincidence.
Also my computer is not too young, so it has right not to remember everything.