One day I bent both of my wheels after hitting a pothole in the road. They were removed and sent away for repair, so the bike stayed in the workshop for quite a while with both wheels off.
Since getting it back, I've noticed that when I brake, the front brake lever occasionally feels like it's stuck, and then the brakes suddenly apply much more force than expected, causing a very abrupt stop. This only happens occasionally.
The brake lever does not feel spongy. I've already cleaned the brake calipers, checked the wheel installation and alignment, and bled the entire braking system, but the problem is still there.