Receiving retained message twice on subscription to multiple topics with one subscribe call

[rmeissne]

Hello,

I am running paho-mqtt version: 2.1.0 with Python 3.10.12

a = [("shellyplusuni-a0a3b366fd80/#", SubscribeOptions(qos=2)), ("v1/#", SubscribeOptions(qos=2))]
mqtt_client.subscribe(a)

Subscription with message ID 1: [ReasonCode(Suback, 'Granted QoS 2'), ReasonCode(Suback, 'Granted QoS 2')]
shellyplusuni-a0a3b366fd80 is online
Subscription with message ID 2: [ReasonCode(Suback, 'Granted QoS 2'), ReasonCode(Suback, 'Granted QoS 2')]
shellyplusuni-a0a3b366fd80 is online

Is this expected? I am receiving "shellyplusuni-a0a3b366fd80 is online" twice, which is an output of my on_message handler (this is a retained message within this topic). Topics are not overlapping. I would expect two message IDs, 1 and 2. However, both have the same reason code list.

With two subscribe calls (one topic each), I get:

Subscription with message ID 1: [ReasonCode(Suback, 'Granted QoS 2')]
shellyplusuni-a0a3b366fd80 is online
Subscription with message ID 2: [ReasonCode(Suback, 'Granted QoS 2')]

I would expect exactly the same output when calling subscribe with multiple topics.

Thanks,
Robert