#8 #9 #10 It's not a coding error; it's a configuration error limiting SF's search depth to 12 plies even for the most forcing variations. For the 3+ variant that limited search depth caused a horizon effect even on the first move (1. e4 d5???) which was only fixable by changing the configuration:
http://github.com/ornicar/lila/issues/502
http://github.com/ornicar/lila/issues/502