Hello everyone.
I have enough  free storage on my device left. Trying to download book.
unfortunately the download - no matter if MM or something smaller - gets always stuck at a high percentage e.g. 98%.

Anyone experienced that issue and knows how to fix it?
Its a device with Android 9

I am having the same issue.

About 1/3 of my books will freeze around 90% and never download.  I waited for several minutes and the download never completes.

I rolled back on the device to android 8.1. 

did your devs look into it, claimed to fix it and passed quality control?

if yes i am willing to update again to android 9 and check. 
If not, i won‘t spend that amount of time. 
On android 9 it did not matter what book. All books were stuck at a certain point, but nicely claiming some space on the phone.

yes, that means even if it was stuck and cancelled on 90% it will claim that amount of storage was nice. 

Update: Completely uninstalling and reinstalling the D&D Beyond app cleared up the issue all books downloaded and readable.

Same issue on my Samsung tab A android 10. I do not have the issue on my gen 1 Google Pixel XL with Android 10 and I also don't have the issue on my Samsung A51 phone with Android 11.

This did not work for me :) 

i even reset the tablet on android 9 completely