In classic Riot fashion, a new client feature is introduced, and in classic Riot fashion, it doesn't work at all how you want or expect it to. Clicking the multi-disenchant button, instead of allowing you to freely left click multiple shards for disenchanting, automatically selects shards in a predetermined and uneditable way.
Upon clicking the multi-disenchant button on the buttom left, the loot screen organizes like this.
You can only disenchant 50 at a time, and only in the exact order it sorts. You cannot deselect any of the shards, which means if you were saving one shard or two for mastery 6 or 7 upgrades, those shards are the first to get presorted for disenchanting (per the text that says "owned and duplicate shards will be disenchanted").
As someone who was excited to finally be able to quickly multiselect shards to disenchant in time for the Essence Emporium, I am now back to square one of meticulously disenchanting one by one in order to save the shards I need for future use. In short, since I generally save 2 shards of each champion for the mastery upgrade, the autoselection multi-disenchant option is unusable.
Truly disappointing that the client cannot support manually selecting shards for disenchanting.
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