Messages read receipts not syncing with iOS
Since yesterday my iPhone X is not picking up on read receipts from messages opened on the OSX app. The notification for new messages is staying on my phone until I open the thread and then it seems to sync and clears them. I haven't changed any settings on either device but I do update them regularly to the latest OS versions.
Hardware
MacBook Pro (15-inch, Touchbar, 2016)
2.6 GHz Intel Core i7
OS: 10.13.4 (17E202)
iPhone X (256gb)
OS: 11.4
MacBook Pro TouchBar and Touch ID, macOS Sierra (10.12.5)