Got this after recent shop refresh
But chips not there:
I don’t want to say anything too mean but you can’t be that naive can you? The challenge shop chips aren’t permanent hence why they aren’t included in the Shop refresh notes 
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OK, did not notice that. Happens when playing while working. So this can be closed/deleted.
Today is a bit of a difficult one to determine whether this is a bug, because the Challenge shop refreshes on every Wednesday. Each week has new heroes…