Hello, this might be happening because of improper occlusion, since you have recently got a new cap, maybe it was not put in it's position properly.
(Or)
There might be requirement of orthodontic intervention.
The given solutions might be helpful:
1. Check for high points, and get the high points trimmed.
2. Orthodontic interventions might be required.
You can consult me for further assistance, I'll be more than happy to help.
Next Steps
Check for high points, orthodontic issues must be ruled out, and firm lesions must be ruled out.
Health Tips
stick to soft diet, avoid eating any hard food for now.