I'm a British citizen living in the Netherlands with a permanent residence permit with type "PERMANENT RESIDENCE DOCUMENT WITHDRAWAL AGREEMENT ART. 18(1)"
According to the website for the Immigration and Naturalisation Services (IND) I can spend 6 months at maximum outside the Netherlands.
Typically when leaving and reentering the Netherlands they don't stamp my passport, but last time I left they did stamp it. Then when I came back ten days later they didn't stamp it.
My concern is that if I go on holiday outside Schengen next year (after the 6 months are up) and they look at my passport it'll look like I've been outside the country for too long. Another possibility is that when applying for a replacement card (the card needs to be replaced every 10 years) the IND might look at this stamp and get confused about how long I spent outside the country. Another situation where they might get confused is if I apply to naturalise and they look at my passport, and again get confused about how long I spent outside the country.
So basically my question is this, should I be concerned about this stamp at all? Does it have any legal implications at all?