itemissimilar condition bug

I want to use the condition to check the boots of the player likes this:

• itemissimilar{i=LEATHER_BOOTS{enchants=PROTECTION_ENVIRONMENTAL:20};slot=FEET} true

But this doesnt really work, that I ask for Leather_Boots that have the protection enchantment 20 Whyever the skill with that condition will work with all dyed leahter_boots, so theres is a small issue, because I just want that it works with items that got the protection 20 enchantment

And one question maybe, can you say me how I can ask for attributes if I want to write the Item in that style as above ? I actually want to ask for the Movementspeed attribute or maybe for the color attribute of boots, to specify them, but this isnt working.