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Nxd4 ?

Stockfish claims that 11...Nxd4 was the best move.
en.lichess.org/EV8H5rJV/black#21

If I turn on the "live analysis", it shows -0.3 for 11...Nxd4
If I then play Nxd4 the live analysis very quickly jumps to +1.3 (!)

Continues with : 11...Nxd4 12.Nxd4 Bc5 13.Be3 Qxb2 14.Qd2! Qxa1 15.Nc3 Qxf1+ 16.Kxf1 a7a6 with still a +1.4

However, the move I played 11...Ne7 gets a +0.4 in the analysis, and seems sensible to me. Why would I sacrifice a knight for just 2 pawns without any endgame compensation like e.g. far advanced pawns ?
It's just that engine is very weak. For some reason it just stops calculating at a certain depth or prunes that continuation. I've noticed this behaviour many times. Its own evaluation can change drastically in just one move.
It's the depth/time limit.

The line where White retains the extra piece requires some cute tactics a few ply into the search, and SF doesn't find them until it hits depth 16/17 or so.

13.Be3 and 14.Qd2 are the only moves that don't give black a big advantage, and that requires seeing to the end of the queen being trapped and giving itself up for two rooks, and then evaluating that position.

It doesn't take very long for SF to find that resource for white from the position before 11...Nxd4 (about 2 seconds on my slow machine), but that is 2 seconds and depth 17.

It's just outside the horizon of what you get in the analysis.

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