As MessyAnswer said, I also agree, that local evaluation works really bad. And here comes the proof for you:
pl.lichess.org/study/oinf0KUgGame is loaded from FEN, becouse it's not my game, so i only want to show you the key position.
Here, Local engine claims -6.8 - corectly finding, that black is on high adventage here. She doesnt change a mind even when evaluating this really long.
But well, she misses forced mate in 5. And the move she propose (bishop drop) is not the correct one.
As i could easly find this watching my friend's game,
the engine shuld really find this in microseconds.
Something is really wrong with local evaluation if she misses the mate in 5 lol.
Server side engine, fortunetely gives a correct answer here.