It is by design, so the power goes to the vital functions at idle (like the oil pump). There is a thread that MH details the functions of the relay and posts excepts from the manual. Yes the relay sheds the high load items below like 1500 RPM and one other trigger that escapes me at the moment (Voltage). I'll see if I can find that thread / Post and link it.
It is in the "Bull__it Polaris" relay failure post that is getting so many views of late. I copy and pasted this from post #38, the relay portion of the wiring diagram is in post #29.
Polaris Manual:
Load shed relay supples power to high beam LEDs, hand thumb warmers, and battery charge relay coil control and power.
The low beam LEDs are powered by the RD/WH DC
Chassis circuit and always on. When the driver pushes
the high beam button on the left hand control, the high
beam switch is closed and power from the load shed
relay (RD/DB) circuit is connected to the YE/RD high
beam circuit. This action illuminates the high beam LEDs
in the headlight.
The load shed relay is located in the protective bag
above the clutch cover.
Excludes 2015 snowmobiles.
LOAD SHED RELAY provides the following:
• High Beam Switch / LED Array Power
• Battery Charge Relay Power
• Hand Warmer Power
• Thumb Warmer Power
• The ECU will close the load shed relay when the
engine speed is greater than 1,500 RPM and chassis
voltage (RD/WH) is greater than 12.8 VDC. During
engine operation, if the engine speed falls below 1,500
RPM or chassis voltage falls below 12 VDC, the ECU
will open the relay and not close it again until engine
speed is in excess of 2,200 RPM and chassis voltage
is greater than 12.8 VDC.