When you try to add text to the document using the "fill and sign" function, the inscription "Enter text" is added. The window with the text input interface does not appear - the inscription "Enter text" is simply inserted. Interaction with the created object is also not possible. Adding other elements works as expected. The problem was detected by Windows 7 Enterprise, Windows 7 Pro, Windows 10 Enterprise (20H2), Windows 10 Pro (2004). All operating systems are in Russian. The problem was found in versions of AdobeReader 2021.001.20142 and higher. The same problem was found in stricter versions, for example 2019.008.20071. Last time, the functionality for users worked in the version of Adobe Reader 11. Testing the functionality in different documents - these documents were not protected.