The sea horizontal surrounded by my toilet bowl keep slowly draining out by itself does anyone enjoy an impression whats going on? ...

When I plug within my electric fire place...
Answers:    The cistern containing the flapper has no deportment in your baggage.
Only 2 possible reasons.
Other services are creating a vacuum between your bowl and the soil stack when they are depositing into the stack.
Extremely unlikely considering the diameter of the toilet drain and the fact that you are draining leisurely rather than is surges.

The other possibility and almost incontestably the culprit is a crack in the bowl. Replace the bowl.
Do I enjoy to unplug anything until that...
Replace the flapper ...dampen seaps past the flapper because its not hermetic,this causes the sea level to drop which afterwards turns the fill spout on to return it to the proper water rank