This one has me a bit stumped! I cannot find anywhere in the phone settings that would control notifications while on a call. I did a bit of Google searching as well and there was not much on this. Unless there are other users here that have had the same issue and found a fix, I am at a loss. You may want to reach out to LG directly as the notification settings are by their design and not the carrier so they may have some tricks up their sleeves.
Hey there Just wanted to see if you had any luck with LG?
Hey there breezybaybenc! Congratulations on the upgrade -- I'm bummed to read that the notifications settings are stumping you (and interrupting your calls). We had a few users with notification questions about Galaxy devices after the update, and our Samsung contact explained that with Nougat, notifications are app-specific. I'm not sure if that's a Nougat thing or a Samsung thing; but it might be worth going into your settings, then locating your native message app (for example), and checking that app's specific settings to see if there's a way to alter the notification from there. If that advice doesn't follow for LG equipment, I'm at a loss, too. Have you had a chance to reach out to LG yet? Were they able to provide any insight? We'd love to know what you heard back!