Hi there,
I discovered that ProgressAlly (AccessAlly plugin) is the one that was causing the menu problem. I reached out to them and they had their developers investigate and found that the issue is on theme side. This is what they said:
"It appears that it is theme-specific and isn’t something that we can fix on our end of things. If you’d like to reach out to your theme developers, you could mention that the theme is overwriting the class via the “nav_menu_link_attributes” WordPress filter instead of allowing ProgressAlly to add the classes to it.
This prevents it from fully “cooperating” with other plugins. So, they may be willing to make the adjustment for you.
Is there any way to work around this problem? I understand x cannot provide third party plugin support however I have reached out to them and they are limited by something on the x side of things. Please advise, thanks!