When an effect triggers searching the library for a card,
the game client becomes unresponsive
and the deck browsing window takes a really long time to load.

This get more severe with bigger decks sizes and the first time a search is done in the game.

The main issue is that, while the client is stuck, the timer still tick down,
very often not letting take a card as it reaches a timeout,
resulting in the search being wasted by force-defaulting in "fail to find".

It gets even more egregious,
when it goes on to force skipping the entire turn,
and sometime a couple of turns if the unresponsiveness keeps going for longer.

In short, with this issue,
it makes it really frustrating to play my casual 250 card deck,
with cornerstone tutor effects as its backbone.

Yes, for instance :
playing a turn 1 atune with eather, only to lose, to this issue,

my first 2 turns, and thus 2 landrops,
as well as the needed basic land fixing to the fail to find,
understandably, really breaks my enjoyment of the game.