Loaded the app for the first time after updating and had a visible claim button for the next event on the Activity Hub page.
Pressed it, and got locked into a page to claim rewards. Pressed the claim button, but as there were no rewards it had the loading icon then returned to the claim page. No option to close the claim page. Back button reloaded the claim page instead of quitting out of it.
Shut down app, restarted, Event no longer visible, and therefore no “Claim Rewards” buttons visible.
Same thing happened for me. It dissapeared after i reloaded the app but now i get an error when pressing leaderboards (i know they’re not here yet since event hasn’t even started but still, an error is an error).
I found a issue when you lose in the event it says you get 50 blue runes but you don’t get and and this has happened to me quite a few times today
Game froze during NoP event. Facing chandra she destroyed a block with first ability, causing a cascade, made a match, causing second cascade, then reinforced an abbot of keral keep, causing a third cascade, more than filling her remaining 5 cards’ mana. Then nothing. Could see her cards’ mana bars pulsating like normal and could still quit the match. 4hrs wasted
The issue with losing in the node event is still there and needs to be fixed as we are not getting our rewards from losing I have met toned this to support and here on the forms with no help in getting anywhere but the run around we need this fixed
Entering an event with 0/750 gold mastery put me into the silver tier. Try entering with at least 1 point.
Care to post what the rewards are for silver/gold tier for us bronzes? 
I was just fighting Chandra in the “nodes” event with Ob Nix. I had despoiler on the field, Chandra made a match, cascaded, droped scab-clan berserker (hand fully charged / 2 cards) and then the game frose. It lets you quit, but that’s about it.
I have 350 into gold and it put me into bronze rewards. All the others are silver.