Strange regression in robocode 1.9.2 vs 1.8.2

Hi everyone.

I see strange regression in performance of my bot when it compiled with different version of robocode.

Specifically if I take EvBot v4.6.4 and compile it with robocode v1.8.2 I am getting about 20% higher score against let's say sqTank.waveSurfing.LionWWSVMvoid 0.01, However, when I compile with robocode v1.9.2 I see drastically worse performance. In both cases I run the battles with robocode v1.9.2.

Does anyone see similar behavior?

When I compare the stats of my more recent bot vs older v4.6.4 for example [4.6.12 vs 4.6.4], I see drop in a score against some bots which my bot use to be good against. There were quite a lot of changes and I originally thought it was due to experimental code, but now I am quite convinced that the major APS drop is due to vs of robocode, since from v 4.6.5 and up I used robocode 1.9.2.

Any ideas?