It would be funny if....

[Patchninja]

I re-seeded 4 of my Square feet squares with mangetout peas. 5 pockets of seeds per square. But, there is a mouse-thing that tunnels up from underneath and gobbles up a pocket! There are now 5 lots of seedlings missing and my veg patch is starting to look hazardous with all the deep holes! So it's not just TV chefs who like pea shoots Monsieur P has set a trap - evil grin!

[womble]

Might be moles? I have moles that do that with my raised beds, they don't eat the seeds I think, but their tunnels dispupt the seeds and small plants, so they never get going, or have roots left in mid air.
Blinkin wildlife

[Patchninja]

There aren't any mole hills. Could it be wombles?

[womble]

We are well known for our Wombling skills


So it could be.