Screen Reader stops after first document

Hi Everyone,

I have a merged PDF document, so when we look at the tag structure, we could see two documents that are stitched together. Now, when i activate Read out Loud on this PDF, it is reading all the way until first document and then stops. I will have to manually start it again on the next page of Document 2. But when i look at the reading order, it should all the pages continously. How can i overcome this ?