Do you work in a launderette WG? Some expert advice there lad!
Ha !. No, I can’t say I do. I used to have that happen all the time though as a kid buying shirts when my dear Old Mother used to abuse the washer’s temperature dial.
I also wash trainers few times a year in a muslin drawstring bag with some trainer cleaner popped in each trainer and it’s never done them any harm. They come up very clean and never had stitching come out. Cool wash and pop more delicate items in a bag and it prevents damage when they rattle around or catch on the drum.