That is alarming.
Can often be due to free ranging and all of them deciding they found a better place to lay.
Or an egg stealing predator, but that's a lot of eggs.
It could be whatever disease killed your 2 birds.
Only way to know what that would be is have a necropsy done.
Well, you didn't come back to answer the questions asked..and still haven't answered them.
It's kinda slow around here in the middle of winter, most folks here are from the US.