Castle Phoenix air ESC firmware question

[simplechamp]

Hey there guys,

Haven't been browsing the RCM forums for awhile. Cars have been on the back burner, got bit by the airplane bug and have been having a blast with those lately.

I have a Castle Phoenix 35 in one of my new planes, and I have a question about the newest firmware. I believe it is 4.xx, not sure exact number.

What happens is when I open up the throttle to 100% it seems to govern/limit the current. Going to 100% then dropping down, then back up to 100% (all rapidly, probably a few times a second). I looked at the settings in CastleLink and figured it was the current limiting setting (the behavior is almost exactly what they describe in the little "?" settings explanation) but it still behaves the same even after turning off the current limiting. When I switch to the latest firmware of the 3.xx series it will run at 100% until the LVC cuts, without any temp issues (even full throttle current is only 15A max). The batteries being used are 1300mah 3S Nanotech, and have no problem handling the 15A load.

Any ideas what is causing this newer firmware to limit the output to the motor, even with current limiting turned off?