If "isPageView" is false, then your hit is being tracked most likely as a Custom Link.
If you've implemented AppMeasurement.js directly, then verify that you're using s.t() to track your page views instead of s.tl().
If you've implemented via AEP Tags with the Analytics extension, then verify that your Send Beacon action has been set to track as a Page View.
If you've tried the above suggestions and none of them solve your problem, please share your implementation for pageview tracking, so that we can try to troubleshoot it.
