I used to use a mix of ELS and non-ELS vehicles, all installed using Albo's mod, without any problems.
Generally speaking, vehicles disappearing is caused by lod issues (this is something the modder who made the vehicle should setup properly) or livery textures (most people think 4k textures are great; but unless you have a higher-end pc, you probably won't notice the difference anyway. So, I always suggest using 2k liveries for better performance on your average pc.)
You can read this interesting bit on lod's: https://forums.gta5-mods.com/topic/10724/why-lods-are-important