Added form fields disappear (Prepare Form)

Greetings:

I am experiencing an interesting issue while creating a form, using Adobe Pro (Ver 2023.006.20380).  I accessed "Prepare Form" to create and establish form fields; however, after configuring all the form fields and saving the document, the form fields are all gone upon reopening the document (reverting the document to a previous state before accessing Prepare Form).  The document requires accessing "Prepare Form" again to access the form fields and none of the previous configurations are maintained...as if no work for the form fields was ever completed. 

Couple of things to note:

1) When accessing the document (within the folder where it is saved), Adobe crashes.  When this happens, the document must be opened within Adobe, using the "Open" function.  Attempting to select the document in its saved folder results in Adobe crashing.

2) I had a locked version (with all the form fields present) and created a copy using "Save a Copy" only to be met with same issue...disappearing form fields.

I made several attempts to research prior to posting; however, could not find anything that addresses this issue, specifically.  

Any assistance would be greatly appreciated.

Thank you in advance.