+1
Since it worked before you need to look for the variable, and I suspect it's the chain length. Shimano and Campagnolo RDs are sensitive to chain length because the jockey wheel rises and falls based on cage angle.
Shift to Granny/34 and pull the lower loop forward and see if the clearance resolves. If so, shift to big/big and see if you can spare th same amount of chain as you pulled up earlier. I so, cut that much off.
But don't forget that you still want a chain that can loop big/big with enough length to spare to make the shift (roughly 1/2-1").
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