Unexplained glow of objects in Deferred rendering path

Hi, I learn Unity for about two months, working on personal project, and recently discovered something I dont know how to explain. When Deferred rendering path is used, some objects (both downloaded and my own created) slightly glow. They keep glowing even if there is no any light in the scene. This is noticeable in the editor as well as the build. Some textures (having normal map) painted on terrain also glow. And even the default material glows.

I use realtime lighting (but not baked / generated any lightmaps yet due to the size of the scene). Anyone knows how to fix it (without changing the shaders code)?

I fixed it by creating realtime global (covering all the scene) reflection probe. It could be set to low resolution and updated on demand, for better performance.