Toddler zoning out often

My babe is nearly 19 months. And she zones how SO OFTEN.

I know there are types of seizures where you zone out but I don't think this is the case.

She still functions while zoning out (if she is doing something beforehand). For example, at dinner tonight she was looking right through me zoned out but continued to feed herself.

Usually I just have to put my hand on her and say her name and she comes back but lately I have to clap or make some sort of noise. She's been zoning out at least 10 times a day.

Anyone else's babe do this? I'm not worried. Just curious.