It would be sufficient to have depth lowered by some factor...
(cpu load due to too much concurrent games and other possibilities)
example vs. Minic
10. Bf4? discarded at depth 8 , 13.Bf2?? discarded at depth 7, both in less than 0.5 sec
(and Jonny is exremely fast in nps and reaches quite high depths normally despite being from 2010)
[pgn][Event "CCRL 40/4"] [Site "CCRL"] [Date "2019.04.28"] [Round "222.5"] [White "Jonny 4.00"] [Black "Minic 0.47 64-bit 4CPU"] [Result "0-1"] [ECO "C02"] [WhiteElo "2746"] [BlackElo "2880"] [PlyCount "55"] [EventDate "2019.??.??"] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. Na3 Nf5 7. Nc2 cxd4 8. g4 Nh4 9. Ncxd4 Bd7 10. Bf4 Nxd4 11. Nxd4 Bc5 12. Be3 O-O 13. f4 Rc8 14. Bf2 Ng6 15. Qd2 f6 16. Bg3 fxe5 17. fxe5 Nh4 18. Be2 Bxd4 19. Qxd4 Bb5 20. Qxa7 Ng2+ 21. Kd2 d4 22. c4 Qg5+ 23. Kc2 Qe3 24. Kd1 Bxc4 25. Bxc4 Rxc4 26. Qa3 d3 27. Qxf8+ Kxf8 28. Rf1+ 0-1[/pgn]