I looked into this issue and it seems to date back to 2015, if not further. Text messages contantly get stuck on "sending." They eventually go through, even if it's 2 months later. It's an annoyance to ezplain to someone that I didn't send the text, only to find out that I did a long time ago. Usually the messages are delayed for a day or two, and sometimes a week. Here's one that has been stuck for 5 days now(see photo). Every message is received by the server, so this shows the app and/or phone is not where the issue lies. I've been seeing this issue for well over a year, but the sending delay is becoming more frequent.
