Waldo Blackberry leaves

in Fruit & veg
My Waldo Blackberry, newly planted in a massive pot in early spring, is doing very well, with lots of fruit. Most of the leaves are green and healthy, but some look like this. Any idea what is causing it? Should I be worried? Thanks for any info 😊

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Waldo is a cultivated bramble - so there's not many bugs that are going to cause it harm.
The berries on mine are just starting to show hints of red atm, and looking like a good harvest.
Wisdom is not putting it in a fruit salad.
You can just about see the same spots on some of the leaves on mine that yous has too
Wisdom is not putting it in a fruit salad.