Welcome to the community! I tried reproducing the issue on my end, and it's working fine for me. Is it happening with all files you're importing from Indesign or a specific file? Did you try using the Adobe Express app on another browser? Try signing out and signing in again in Adobe Express and try again to check if that helps.
Thanks for posting about this. Would it be possible to share an example InDesign file or some screenshots of the issue? Would it be possible to share an example Adobe Express file too?