Should Current sense resistors heat

Hi,

I am facing an issue when I am testing motor controller. During testing, I noticed that the temperature of the current sense resistor of the driver IC is getting heated at a very fast rate. Is this normal?

Also can anyone please help me with the doubt that should current sense resistors get heated at a fast rate. The temperature rise was observed from 30 deg celcius to 50 deg celcius within 15 minutes.

Kindly resolve my doubt.