Blender 2.8 Composition Play Animation Lag

Hey Guys, I have been looking here and there to find a solution to this annoying problem, the animation play lagging. All I have done is to import small-sized clip in Blender 2.8 to add small VFX. But, whenever I play animation without even adding or modifying anything, the play starts lagging, no matter what frame I set. I have a fast computer and I haven’t faced any lagging problem in Blender except this annoying one. Any ideas or suggestions?