We get abstract metadata from diverse sources and sometimes we have to source it from fulltext articles using text mining techniques. Our processes usually do a great job collecting just the abstract. But sometimes, they pull in additional information after the end of an abstract.
If you come across an error, you can submit a correction to the abstract text using this form: Fix an OpenAlex work record
If you find a broader issue that affects more than a few individual articles, let us know at support@openalex.org so that we can investigate and deploy a fix.