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nrf connect indicate subscribe

When I connect to my firmware after cycling Bluetooth on iOS, I am able to subscribe to my Characteristic Indications without any issues. The nRF connect app receives all my my value indications.

After disconnecting, subscribing a second time doesn't go through. It looks like I'm not receiving the CCCD write command. I think it might not be a firmware issue because cycling Bluetooth on the iPhone forces the app to behave properly again.

Is this potentially an issue with nRF connect?

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