Erratic Read Receipts

Starting this morning when i receive text messages on the iMessage app my wife’s phone nor iPad are sending read receipts to my phone or iPad. I’ve have her double check the settings on both devices specifically under messages and under my contact info and in both places, read receipts are turned on. I had her restart both devices, no help. I had her completely log out of the iPad, no help. I had her completely reset the iPad to factory settings, no help. I had her log out of iMessage on both devices, no real help. Now what’s really weird is that occasionally, it will pop up as read, but with out changing any settings, it reverts back to just showing delivered. Just wondering if it’s from a recent update.

Thanks in advance

Matt