For four days I've had intermittent connection issues with Arena. Sometimes I get the error screen 'Error Updating Data', and when I do retry enough times to get into the game, the games are laggy, skipping through my phases without allowing me to cast spells or respond in any way. It happens on PC, on my Steam Deck, and on my Pixel. My internet connection is fine -- ping ~10, download between 20-25 Mbps, and upload around 4.7 Mbps.