I'm pretty sure updating to the mod firmware will sort the issue. after reading some info on Team Orions site they confirmed that running a mod motor on stock firmware is definatly a no no, note the last point below:
Please read before updating!
• For Windows computers only!
• The optional ORI65150 Vortex DSB-R program box is required to use this software.
• When you connect the ESC to the computer via the programming box, the software automatically detects the ESC type and only shows the compatible ESC firmware
• Not all the ESC connect the same way to the program box. Check the
DSB-R instructions for information on how to connect your ESC to the program box.
• Make sure to update the program box firmware before you can update the ESC firmware.
•
Stock motor firmware is only for stock motors! Low wind motors will be damaged with this firmware.
Fingers crossed