Very bad endgame (maybe some bug in tt code or search)

[Matthies]

In this game https://tcec-chess.com/#div=vsob29&game=103&season=29 Rubi fails to see the winning in this 6-piece position even using TB5

setoption name Hash value 1024
setoption name SyzygyPath value c:\Schach\TB\5
position fen 8/k6q/P2Q4/1P3K2/8/8/8/8 w - - 1 83
go
...
info depth 59 seldepth 87 multipv 1 time 1292431 score cp 9 nodes 4008908859 nps 3101833 tbhits 133360271 hashfull 267 pv f5g5 h7g8 d6g6 g8d8 g6f6 d8g8 g5h6 g8d5 f6f2 a7a8 f2e2 a8a7 e2e3 a7a8 e3e8 a8a7 e8e7 a7b6 e7g5 d5d4 h6g6 d4d3
...
info depth 62 seldepth 98 multipv 1 time 2447602 score cp 9 nodes 7751849865 nps 3167119 tbhits 234577895 hashfull 392 pv f5g5 h7f7 d6c5 a7b8 c5e5
...
info depth 64 seldepth 97 multipv 1 time 3427423 score cp 9 nodes 11291196844 nps 3294368 tbhits 292630855 hashfull 411 pv f5g5 h7f7 d6c5
info depth 65 seldepth 92 multipv 1 time 4624469 score cp 9 nodes 15548999343 nps 3362331 tbhits 356669923 hashfull 455 pv f5g5 h7f7 d6c6 f7g7 g5f4 g7d4 c6e4 d4f6 e4f5 f6d4 f4f3 a7b6 f3g2 d4c4 f5e5 c4d3 g2h2 d3c4 h2g3 c4d3 g3f2 d3c2 f2f1 c2c4 f1e1 c4c1 e1e2 c1c2 e2f3 c2c4 f3e3 c4f7 e5e4 f7c7 e4d3 c7e5 e3d2 e5f6 d2e2 f6f7 e2e3 f7c7 d3f5 b6a5 e3d3 c7c1 d3e2 c1b2 e2f3 b2c3