Planet EPIC 22881391 b
According to the link above, this planet's mass is 0.7 times Jupiter mass, and it's radius is, however, only 0.079 Jupiter radius. 
What does this mean? Jupiter's mass is 1.898×10²⁷ kg, and it's radius is 71492 km, so we could get the mean density of this exoplanet -- it's about 1.76×10⁶ kg/m³ ! We all know that Earth's mean density is about 5.514×10³ kg/m³, while a typical white dwarf has a density of between 10⁷ and 10¹⁰ kg/m³. So EPIC 22881391 b is more likely a white dwarf, but not a planet, huh? 
Or is it just a typo?

It's not a typo.  The reported mass of 0.7 Jupiter masses is the upper limit based on constraints from radial velocity data.  (This is why exoplanet.eu says 0.7M_J with errors of +0.0 and -nan).  

A more probable mass would be found by the mass-radius relation for planets, but it depends on the composition.  The discovery paper suggests a more realistic upper limit is 3 Earth masses.

It's not a typo.  The reported mass of 0.7 Jupiter masses is the upper limit based on constraints from radial velocity data.  (This is why exoplanet.eu says 0.7M_J with errors of +0.0 and -nan).  

A more probable mass would be found by the mass-radius relation for planets, but it depends on the composition.  The discovery paper suggests a more realistic upper limit is 3 Earth masses.

Oh, I can see your point. It makes perfect sense. Thank you for answering my question

That, or we found something made of the same substance that makes up the Kerbal planets xD