My experience level of Minecraft's wild map doesn't go up!!!

Hi. My experience level hasn't gone up on my map since a few days ago.

I don't know why. Experience beads fall and sound eaten, but my level doesn't go up. I'm having a hard time because it's stuffy. Please give me a solution quickly. If I use the command to raise the level, it goes up. If I break the experience bottle, my level goes up. But I don't level up at all any other way. I just don't know why..............