When a creature is invisible but not hidden, one could argue that the players still know it's general location. If a creature becomes invisible and not hidden does it remain on the battle-mat?
From the PHB, Appendix A on Conditions: INVISIBLE An invisible creature is impossible to see without the aid of magic or a special sense. For the purpose of hiding, the creature is heavily ...
Does a simple casting of Detect Magic reveal the presence of magical invisibility?
In D&D 5e, the description of hiding (PHB p177) says an invisible creature needs to stay quiet and otherwise avoid leaving signs of its passing, while the "invisible" condition (p291) says the ...