When opening a PDF, there is a section in the bottom-left that says "Get PDFs e-signed. Recipients sign online for free." There is a delay between first opening a form and when this section appears. During that delay, you can start typing in a field, but when the "e-signature" section appears, the field you're typing in will lose focus and you'll get interrupted.

This also happens in Reader DC, but instead of "e-signature", the pop-up is about a 7 day Pro trial.

Steps to reproduce:
1. Open a form with at least one text field in it
2. Quickly click on a text field and start typing
3. Keep typing until the "e-signatures"/"free-trial" section appears (About 5 seconds)
4. The pop-up will interrupt your typing because it forces all fields to lose focus

Environment: Windows 10 and Windows 11 with every version of Adobe Acrobat and Reader DC since September 2023. At least one version in 2024 would cause Adobe to crash instead of just losing field focus.

Observed result:
The field will lose focus about 5 seconds after the opening of the form, but only on first initialization

Expected result:
The field should not lose focus. It should not interrupt your typing.