If a bowl loses it seal (water) it normally means either a possible blockage

Or oscillation (wind effect)

Or negative or positive pressure

Do to poor venting OR possibly the refill tube is not inserted into the over flow tube of the Douglas valve.

There of course other reasons it could happen but this is a great place to start checking

The refill tube looks ok. No water is leaking on the floor around the bottom of the bowl. If the wax seal has a crack, will that cause the bowl water to drain out? There was a blockage last week, but the plunger took care of that...At least I thought it did. Now you have me thinking...

UT OH!!!!!!!!!! come to think of it, my wife was coloring her hair and I saw her toss somewhat large cotton pads in that toilet! I bet it's still blocked!

Normally I try not to use a plunger as why push the obstruction further down stream instead use a closet auger (General makes a decent one) and your better off retrieving the things causing the blockage

Do you have a dog?

Yes, I have a dog, but it's high class...Only drinks spring water. LMAO!!!

ok thanks. i will try that auger.