Problem with SolrExtractor

I have a site that is hosted on Acquia and is configured per https://docs.acquia.com/acquia-search/search-api/attachments (so using the solr extractor), also has a patch from this issue: https://www.drupal.org/project/search_api_attachments/issues/2896418 →

All works fine for the most part, but sometimes I have the issue that text in a file is not indexed properly.
For example, if I have a file that contains the sentence "hey I'm an awesome file please index me mkay plz thx", the text will be indexed with whitespaces in between words and some words will be cut off, like "hey I'm an awe some file pl ease inde e mkay plz thx". I don't know if this is an issue with this module or a Solarium issue, but right now I'm a bit at a loss and just wondering if anyone else has experienced this and maybe can give some pointers into which direction to look?