Heart rate graph not displaying on app

I have this issue too. Does anyone have an answer. I t is less than 2 weeks old. It was displaying a graph but stopped 2 days ago.

You will need to provide more details, if you want some sensful advice. Does the HR show on the watch? Does the watch sync to the app? Is any other data missing on the app too? Did you try restarting the watch? Does the web version of Garmin Connect show the HR data [https://connect.garmin.com]? Is the watch set as the preferred tracking device, and is activity tracking enabled? What about syncing over the USB cable - same result of different?

Depending on the answers, there may be a big choice of possible reasons. Some of the most probable ones are listed in the following thread: [https://forums.garmin.com/apps-software/mobile-apps-web/f/garmin-connect-mobile-andriod/245295/my-steps-are-not-showing-up-on-the-calendar-on-garmin-app-in-the-watch-fenix-3-hr-the-history-is-still-showing-my-steps-correctly/1162470#1162470] 

Heart rate monitor works on watch and phone. I ran this morning and it recorded my heart rate then and I can see this. I can't see my resting heart rate on my dashboard. I have tried to disconnect and reconnect but no change. 

In that case follow carefully all the instructions from the support document Data is Missing from My Garmin Account After Syncing to resolve the issue. If it does not help, check the remaining options from the thread linked in my previous post.

I have tried all of this. I have logged out of PC account. I have dosconnected phone and watch. I then reconnected phone and resynced phone and watch and relogged in online but still no heart rate graph.

What else can I try as this isn't working. Is my watch faulty? It only worked for a few days. I think the issue may have arisen when I put the Garmin express app on my PC. I have removed the watch form Garmin express and have deleted Garmin express from my PC. Still no joy though.

Same issue here. Everything worked great until a few days ago. Heartrate, pulse ox, and respiration in the app are displaying intermittently. Pulse shows up during exercising after synching only.  just wierd. the Fenix 5 shows all.

Hurrah it is working again. Thanks so much for persisting. It took 40 minutes but hopefully all will be well for many months and years now! Thank-you.

I powered off my watch and powered on.  Seems to have fixed it. 

Same here, the app stopped getting the data from the watch. Just restarting the watch fixed it.