Hope you are doing well Sorry for your experience with Acrobat Reader.
Would you mind sharing the script used or the sample file for us to try and reproduce the issue at our end?
Also, can you check with the web version of Acrobat if the file opens fine there: https://acrobat.adobe.com/
Look forward to hearing from you.
Is the issue specific to a PDF file, or do you face the same problem with all the files having the script?
If with all the files, can you please share a screen recording of the workflow, a sample file for us to try and reproduce the issue at our end so we can forward this information to the team for further investigation?