objects invisible to reflects

Are your effects settings set to high or epic? Because on lower settings it removes screen space reflections. So to check this go settings>engine scalability settings> effects and set it to High or Epic.
Also, check in your post process volume settings for SSR quality, and if needed increase it. On default it also can give effect like some highlights are leaking because it blends more with cubemap. Upping the value can fix this.