I agree with what's being said. Tiny eggs (sometimes called fairy eggs or wind eggs) happen from time to time, even in hens that have been laying for a while. It’s usually just a glitch in the system—maybe a yolkless egg or one that developed too fast. If your hens are otherwise healthy and laying normally, it’s nothing to worry about. Sometimes an increase in laying can lead to the occasional oddball egg, but as long as they’re acting fine, it’s just one of those chicken mysteries!
In most cases, tiny eggs aren’t a sign of disease--just a random blip in the laying process. However, if you (or anyone else who may see this some day) sees them frequently or notices other issues (like lethargy, feather loss, or odd egg textures), then it might be worth looking into.
Some possible causes besides "normal glitches" are: 
Stress or sudden changes – Weather shifts, a predator scare, or even rearranging the coop can throw off their laying.
Young hens working out the kinks – Even if they've been laying for months, their system can still occasionally misfire.
Nutritional imbalance – Not enough protein or calcium might lead to irregular eggs.
Reproductive issues – In rare cases, hens with ovarian problems (like overactive ovaries or early reproductive decline) might lay unusual eggs. That can signal through a cascade of symptoms like a decline in vitamin A levels, and then things associated like paler legs, dark wet poop, and even craving for calcium.