Pages not showing correctly in reference list (and Zotero editor)

Hi everyone,
I have a problem showing pages of references when using the Vancouver style. Somehow they are randomly missing numbers. Here's an example:

https://imgur.com/a/yXfnBl1

The marked area should include pages 207-216 but somehow the 2 is missing. I can't figure out how to fix this as everything is fine when checking the entry in zotero itself:

https://imgur.com/a/ikHAplW

Thanks in advance for your help!
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