The issue has been fixed in the latest release of InDesign – InDesign 2021.
Please update to this new version of InDesign to get the fix.
Adobe InDesign team
An error occurred while saving the commentAjit Kaur commented
We would like to understand the precise issue you are facing. We have a reference snapshot from Johnny. Is your issue also the same?
Please help us by providing the InDesign file having the characters which cause the issue. Thanks!