OK Google not working on Galaxy Note 5, unless I press the home button.
I have tried several fixes and gone through several tutorials and everything is turned to "on" the language is set to English.
I do not see a button/setting marked "always on" but other than that everything is set to On/Enabled.
Began after most recent update for 2019.
Can you explain more on what you mean Google isn't working? Do you mean the app for internet?
might try doing a cache/partition wipe on the phone..might be something hung up in there..also make sure the app is fully updated.
if neither of those work you can also boot the phone into safe mode to see if any apps are causing trouble out of the blue with it.
other than that using voice to text or anything else like that is working fine? hears your voice just fine?