PDFs from InDesign not showing correctly in Chrome Browser
In an InDesign document I've added these text frames. They're filled with a spot color set to 25% opacity.

They've been exported to PDF and published online. They appear as expected when viewed in Safari and Firefox, but are not rendered correctly in Chrome:

The problem seems consistent across three Mac OS (Sonoma 14) users, but one Windows user sees the PDF correctly in Chrome.
Any trouble shooting leads are very welcome.
