I have a report is ssrs, it consist of a main report which has a header containing the page number and 2 sub reports (report page 1 and report page 2) within a tablix. Report page one comes first, then report page 2 displays on the next page after the end of report page 1. The subreports can be anywhere from 1-3 pages. The page numbering is reset between each set of report page 1 and 2 (so if page 1 is 3 pages and page 2 is 2 pages, it goes from page 1-5, then resets). These are called for each record (with grouping) from the main reports' query. The report is around 1000 pages total. It renders perfectly on screen, but when I try to export to PDF, it will sometimes (like 1 time in the 1000 pages) display part of report page 2 on a page (as expected, the page number matches with it), then it will start printing report page 1 of the next group on the same page.
Here is the layout of the main report:
Here is the document outline for better understanding:
And here is the page that is wrong...
This is what it should look like (the last page of sub-report page 2 even has just the total record like the broken one!
I have tried everything I can think of. I have tried (i think) every combination of page breaks on the rectangles and groups, I have tried making a tablix with 2 rows using the same group and again tried every combination of page breaks. I have tried changing the number of records on a page. I have tried changing the consume whitespace option on both sub and main reports. I have tried adding both calculated and random amounts of white space. I have recreated the report from scratch a couple times. I'm sure there's more, but it would be like going through a full feature list of SSRS... Basically, I tried everything I could think of, then everything suggested in the links on the first page of about 10 different google searches. I just have no idea what is going on with this, any help would be greatly appreciated!
Let me know if you need any more info, screenshots, or whatever and I will try to provide. It may be highly "redacted", but I will provide anything I can.