When opening an Approved Email that is sent to a @gmail.com email address, the Opened Activity record is not recording the correct Client OS and Client Name.
For security reasons, Google caches the images in any email sent to Gmail onto a local server. Opened events are tracked when the images in the emails are rendered. When emails sent to a Gmail address are accessed, they most likely have the tracking information of where the image is rendered on Google's servers and not the actual recipient's details.
This is not in Veeva's control. Tracking can be confirmed by sending a test email to a non-gmail email address.
CRM Help Documentation: How are Gmail opens reported within Email Analytics