Cisco 79XX Message indicator not working with FreePBX 12

First off, I know that the Cisco 79XX phones are old and have lots of quirks, but I have a system that has about 9 of them still. Since updating the modules to the latest versions about a month ago, the message indicator light no longer works for these phones when they have a voicemail. I am looking for solutions or others who have the same problem to assist. Please let me know if there is a solution or setting change to look for. Thanks