Steps to reproduce:

with recent builds of nvda 2021.3 alpha, after commiting "make UI automation for recent office365 builds" install math type, (demo will be sufficient), and math player 4.
try to read math, once you focus a math equasion, nvda just announces "graphic, math type x.x equasion"

Actual behavior:

math is not recognized nor can it be navigated.

Expected behavior:

NVDA should still be able to work with math in word

System configuration

NVDA installed/portable/running from source:

installed

NVDA version:

(NVDA)
Version: alpha-23953,f8df880a

Windows version:

windows 11

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

Math type 6.x or 7.x and math player 4

Other information about your system:

I think this is errelivant to the issue.

Other questions

Does the issue still occur after restarting your computer?

yes

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

yes, nvda 2021.2 works as expected as long as "use UI automation with word" is not checked.

If NVDA add-ons are disabled, is your problem still occurring?

yes

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

yes