This is so lost in Agile. Engineers should get the time to “sand” their products, but we just don’t. If QA doesn’t make a ticket for the space between, it’ll never get fixed. The customer probably notices this kind of a thing but it’s a miracle if the customer bothers to report it, and another miracle if it eventually turns into a ticket, and another miracle if someone prioritises it enough to spend time fixing it. […
You obviously have a process that does not serve your customers' needs: work with your team to fix it.
If you have SCRUM ceremonies, a retrospective is where you can raise it, but really, any time works (retrospectives are to purposely look at the past few weeks, but things you notice along the way, look to solve along the way).