I don’t stutter alone

I don’t stutter alone So ever since I noticed I had a stutter (from abt age 7), i noticed it never happens when I’m speaking to myself alone in a room. Or talking to myself looking in the mirror, or reading out loud alone in a room. An interesting thing i recently discovered (I’m 24 now btw) is that recording myself goes either way. When I’m conscious that im alone and if I make I mistake I can just restart the video, it immediately unlocks fluency, but when I imagine people watching the final version, the anxiety and block creeps back up. My stutter is mild (sometimes very rarely though severe). Is this normal or what does it mean?