Bosch 1200 express heater element damage

I recently replaced the heater element in my bosch exxcell 7 1200 express front load washing machine due to the machine tripping the fuse, when i removed the element i could see that a gouge had been taken out of it about 2-3cm from the seal. I put this down to age as we’ve had the machine for 4 years with no problems. I replaced the new element, making sure it was inside the retaining clip and after 3 washes it tripped the fuse and after i removed it again i can see the same has happened. When spinning the drum and looking through the gap for the element you can see a section more than the rest, could the drum be out of shape ? Any help would be much appreciated.