Steps to reproduce:

1. In Firefox, visit this website
   https://www.dinnerkrimi.de/spielstaette/karlsruhe/badisch-brauhaus_005895/details.html
2. After the website is loaded, press nvda+8 to turn off automatically set system focus to focusable elements
3. In browse mode, press b to jump to the spin buttons
4. press enter on one of them to adjust the value in the spin edit

Actual behavior:

Focus jumps to the task bar or to the address bar. The value in the spin edit does not change.

Expected behavior:

The number in the spin edit should change and the focus should actually not change its position.

System configuration

NVDA installed/portable/running from source:

Installed

NVDA version:

alpha-17928,9dfbd2ee

Windows version:

Windows 10 1809 update

Name and version of other software in use when reproducing the issue:

Firefox 67.0.4.

Other questions

Does the issue still occur after restarting your PC?

yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

no