Steps to reproduce:

1. Open a page in Google Chrome containing a combo box (select of size 1).
2. In browse mode, arrow to the combo box.
3. Press alt+downArrow to expand the combo box
   Note that the combo box opens and NVDA switches to focus mode.
4. Press either escape or alt+upArrow to close the combo box.

Actual behavior:

NVDA switches to browse mode and the combo box does not close.

Expected behavior:

NVDA should switch to browse mode and the combo box should close.

Technical info:
NVDA thinks the list and list items inside the combo box are a part of the browseMode treeInterceptor.

System configuration:

NVDA Installed/portable/running from source:

Installed

NVDA version:

2018.3beta3

Windows version:

10.0.17744

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

Google Chrome 70.0.3530.0 (Official Build) canary (64-bit) (cohort: Clang-64)

Other information about your system:

Other questions:

Does the issue still occur after restarting your PC?

yes

Have you tried any other versions of NVDA?

2018.2.1