Yes, this is a huge shortcoming of InDesign; graphics that are referenced within body text should be anchored "near" where the point of body text, either at the end of the sentence, end of the paragraph, or end of a major section break. You decide what's most appropriate. Note that they should never be anchored within the sentence itself because this breaks the concentration and comprehension for the user.
In the case you describe, we recommend:
- use a cross reference hyperlink with a matching "return" hyperlink back to the body text;
- in the PDF, adjust the location of the graphic's <Figure> tag to follow the body text <P>. This is done in Acrobat, not InDesign because of Indy's lack of tools to anchor on different spreads;
- Vote for this feature to be added to InDesign: https://indesign.uservoice.com/forums/601021-adobe-indesign-feature-requests/suggestions/41552164-ability-to-anchor-graphics-across-spreads
VOTE!
Without your vote at UserVoice.com, Adobe will not correct this problem.
Encourage your colleagues to vote. We need to get this fixed, and voting is our only way to accomplish this.
You can see other accessibility issues at our clearinghouse, www.PubCom.com/vote where we keep tally of what's requested for InDesign, MS Word, and Adobe Acrobat.
Hope this helps.