Everytime I "add text comment" on PDF, and it will disappears

[Diego2348290099r8]

When I using Acrobat Pro 2020. Every once I clicked "add text comment" on PDF, and will disappears when clicking away from text. What's wrong on it?

[Amal.]

Hi there

Hope you are doing well.

Is this an issue with a particular PDF file or with all the PDFs? Please try with a different PDF file and check. If the file is stored on a shared network/drive please download it to your computer locally and then try again.

Also, check to see if there are any filters that have been applied and clear them.

From the Filter comments menu in the Comments list, do any of the following:

To clear all filters, click Clear All. Alternatively, use Ctrl+8 (Windows) or Command+8 (Mac OS).

Use the toggle switch to show or hide all comments. Alternatively, use Ctrl+Shift+8 (Windows) or Command+Shift+8 (Mac OS). https://adobe.ly/3SWbS83

~Amal