The AI in solo mode has some insane "luck" with draws. On multiple occasions my screen locked because the series of ritual and link summons took so long. The one that stands out the most to me is when I had a blue eyes on the field and my opponent had no cards on their field or in their hand. During their next draw the AI got the one card needed to fusion summon using gy cards, and then used the summoned card's effect to special summon another fusion monster. Both had over 3k attack.