Items that have an attribute or modification cause poor optimization on mobile devices.

Let's give an example:An enchanted netherite sword. The sword being enchanted causes lag. This is due to rendering the enchantment flash.

Another example: Shield with banner. Creating a normal shield with a banner with or without a pattern causes a freezing moment, this can be caused by two things: A shield with a banner may cause lag when creating and equipping a shield with banner patterns.

Another example: Custom banners, the same situation as with shields with a banner. When holding a banner with or without patterns, it causes a small lag when selected by the main hand,

And one last example: mobs spawned with armor with or without enchantments. Zombies, skeletons, piglins, or other creatures capable of equipping armor may cause lag when spawning, They can even cause lag if they are generated with items with or without enchantments.

When playing specimens similar to those mentioned, a freeze of an estimated 4-5 seconds per item selected, equipped, or created.