Weird bug with engine evaluation

[Lou-E-303]

Exact URL of where the bug happened

https://lichess.org/crcNSagT/black#22

Steps to reproduce the bug

1. Clicked engine eval toggle top right on analysis page
2. Scroll through moves
3. Also clicked 'request computer analysis'

What did you expect to happen?

1. Eval to not be 0.0 when I've just won a piece
2. Server side analysis to match

What happened instead?

1. Engine gives 0.0 all the way through the game, even when one side is blatantly winning
2. Server side analysis gives correct evals

Operating system

MacOS 12.6.7

Browser and version (or alternate access method)

Chrome 118.0.5993.117 (Official Build) (x86_64)

Additional information

No response

[M-DinhHoangViet]

It seems like after about 5 moves it will return to 0.0

[ornicar]

Thanks, we reverted the changes, it should be working now.

[xjcl]

Thanks, we reverted the changes, it should be working now.

What change did you make? Did you already push it into production? I can repro the bug on OP's game and it also affects my 960 game (https://lichess.org/pGqjssJ5#16 9. b4 wins a piece but is valued at 0.0 in the browser engine)

[xjcl]

Looks like it has been reverted just as I posted that, so everything works now. Old version has the on/off switch on the right and says "Stockfish", new version has the on/off switch on the left and says "SF"