Hello,

I have an older toilet. A few years ago, I
changed all the parts inside the tank. It
has worked fine since then. Until now.

Lately, it has an odd pattern. I flush the
toilet. The tank and bowl refill fine.
I've watched them.

Then I come back next time. And the bowl is
almost empty!

And, it only seems to happen intermittently.

It's really bizarre.

Does anyone have any idea what might be
causing this, and the solution?

Thanks a lot!