Blu-Ray player sluggish on dual-layer titles, but not on single-layer

[japlytic]

On a Blu-Ray player, I find that dual-layer Blu-Ray titles are a bit sluggish, even though the video plays back flawlessly, but single-layer titles are fairly quick.
This is for a Chinese-made Blu-Ray player (budget brand sold by a major retailer) from around 2010, but sluggishness (even a brief pause between layer transition)on dual-layer Blu-Ray titles can be an issue that mainly affects early-generation players.

[tom66]

Re: Blu-Ray player sluggish on dual-layer titles, but not on single-layer

Dirty laser?

[ben7]

Re: Blu-Ray player sluggish on dual-layer titles, but not on single-layer

Maybe the video processor clock is too slow?

It might also have to do with how the video processing circuits are laid out.