Thank you for your reports! We are currently investigating two issues that appeared from the most recent update.
1. Consumables are disappearing when entering arenas
We have temporarily removed the consumable block for 3v3 Arenas while we investigate the issue.
2. Infinite Loading Screen with a possible 30 minute ban while attempting to load into the Arena
Unfortunately this problem requires additional investigation and diagnostics.
Thank you for your patience and understanding while we work to resolve these issues.