Japanese knotweed leaf damage?

Japanese knotweed leaf damage?

Observation - Japanese knotweed leaf damage? - UK and Ireland. Description: Hi, can anyone help with id of what is causing the red blotches on the leaves of this Japanese knotweed? is it a leaf miner?

Hi, can anyone help with id of what is causing the red blotches on the leaves of this Japanese knotweed? is it a leaf miner?