Not true at all. The nature of light with respect to wave vs. particle is completely understood. Is light a wave or a particle, then? Answer: yes. The problem is that common sense tells us that a wave and a particle are distinct types of things. Common sense is the problem, not our understanding of light, however. Waves and particles are not necessarily distinct types of things; something can have characteristics of both. In fact, all "particles" have wave character, including macroscopic objects. The wavelength of macroscopic objects is just too short to have any significance. However, the wave nature of subatomic particles is significant. That's how electron microscopes were built. Without the wave nature of the electron, the electron microscope would not function.
No more research needed there, then. Looks like you cleared that up.