How to reproduce:

• Start Kleopatra and NVDA
• Select an OpenPGP certificate (that can be certified)
• Start the certification of the selected certificate

Observed result:
The Certify dialog is opened and NVDA reads the introduction text "Verify the fingerprint, mark the user IDs you want to certify, and select the key you want to certify the user IDs with. [...]" four times (and also some other text).

Expected result:
The Certify dialog is opened and NVDA reads the introduction text "Verify the fingerprint, mark the user IDs you want to certify, and select the key you want to certify the user IDs with. [...]" once.

Note: Reading the dialog's text twice also happens for other dialogs, e.g. the Delete Certificate(s) confirmation dialog.