MisterQueen still moves while being check mated

[rontant]

Any plan to fix this?

root@rock64:~# misterq
uci
id name Mister Queen
id author Michael Fogleman
uciok
position fen 8/2p1k3/5p1p/7P/6P1/8/r7/q1K5 w - - 0 44
go movetime 2000
bestmove c1b1