To change the speaker models on the Powercab+, I send CC22 messages, values 1-12, using the Helix Expression Pedal 2. As you indicated, in the Powercab Edit app, the speaker will change in the grey field to the right of the box but the preset title in the left menu does not. A similar phenomena happens on the Powercab+... when sending the CC messages, the current speaker name does not change but just says <edited>. The only hint that the speaker has changed is the color of the ring around the Edit knob and the sound of course. But unless you memorize the ring color for each speaker preset, it is very difficult to tell what speaker model you have selected.