Fitness app: Activity sharing only works one way

Hello!

My friend and I are trying to add each other in the Fitness app so we can share our activity rings.

We both have Apple Watches and iPhones, and all devices are updated to the latest versions.

Here are the steps we follow:

1. One of us sends an invitation in the Fitness app: Sharing tab → + in the upper-right corner → Invite Friend → select the friend’s contact, the same one used for iMessage → Send.
2. The invited contact appears in the Invited section of the Sharing tab.
3. The other person receives the invitation.
4. The other person accepts the invitation.
5. After that, the invitee is added successfully and can see the sender’s activity. However, for the person who sent the invitation, the other person still remains in the Invited section. This does not change over time.

So, long story short: only one of us can see the other person’s activity. The person who sent the invitation never gets access to the other person’s activity.

We have already tried several solutions:

1. Deleting each other’s contacts and rebooting our iPhones.
2. Removing each other from the Fitness app.
3. Sending the invitation from the Apple Watch instead of the iPhone.

None of these solutions helped.

Could you please help us fix this issue?