Just bleeding my brakes guys and wondering what would be causing this. I bled the master cylinder. No air bubbles. Then went to the right caliper (from a sitting on the bike point of view) and bled that brake. No air bubbles. Then the left brake and getting ever so tiny bubbles in the line. I am using a pneumatic system to bleed. Tried resetting the line on the bleed nipple numerous times and still tiny bubbles. It feel like I get good brake pressure on the brake lever. Can't see any leaks anywhere. Is this normal to get the tiniest of bubbles? Thx!