Confused about vowels in Dutch
In the "Algemeen Nederlands Woordenboek" (which to my understanding is a reliable source), for example the word "beet" has "Fonetische schrijfwijze[ *b eː t ]" and the word "beer" has "Fonetische schrijfwijze[ *b eː r ]". So supposedly the vowel should sound exactly the same in both words, but every native speaker I know (including myself) pronounces the vowel quite differently in "beer" (more like bɪːr). The ANW does this consistently for words like this.
What is going on here? Am I misunderstanding the IPA or is there a difference between dialects?