Hmmm, interesting.
Can disconnect the water feed line, drain ALL the water from the toilet and check for leaks in two different steps?
First step, now that you have a dried toilet, is to add water to the top reservoir and not the bowl. Walk away for an hour (or four) and then come back and check. Here you're looking for a leak from the reservoir only.
If that checks out then add water to the bowl, a little at a time so it doesn't make it past the weir/trapway. Then walk away and come back later. Here you are looking for a leak from the bowl itself.
What I think you may have is a crack/leak at the weir, trapway or even at the outlet. But one would think you would have seen it.
Sub'ng cause I want to know what you find.
I turned the water off to the toilet, so we will see what we find! SO there is almost no water in the reservior, so we are doing test #2.
Granted this is at a rental so you never know what information tenants are going to give you.
I suspect it might be cracked, I am capable enough to build an entire bathroom from scratch surely I can set a toilet correctly, or at least on my second or third try!
Super helpful thanks Craig!
Yeah sweat I would see on the tank right?