I am another affected user. Bought 24 pcs 120 film last year, and another 20 in May - on each single developed roll the wavy "micro-crack" pattern in the film surface is present. I haven't seen it in prints. My primary concern now would be how this might develop during the long-term storage of developed negatives.
If you have a concern I'd contact Ilford. Even if these micro-crack patterns don't affect prints I am sure that Ilford will be concerned to determine if it is an Ilford fault.
You deserve an investigation and Ilford deserve the chance to do one.It can't do anything unless it is told