Motion no longer supporting pdf page views

Hello, I began a Motion project yesterday using a single 90+ page PDF along with a video. After placing a few PDF pages using Media > Properties, I notices a mistake and redid the PDF (using InDesign). That worked perfectly...all previous slides updated and page numbers were retained. But today I noticed another minor issue in the PDF and output again (using the exact same settings) and all my slides in Motion reverted to "Page Number" 1 with no way to change that value. I tried creating a new PDF removing all hidden layers as suggested by another user here but that didn't help.

The only solution I discovered works is manually dragging the PDF to replace all 90 slides in Motion.