Trying to set V2 speed in MCP. I can turn the knob, but the MCP doesn't show the speed, stuck at ---. It does update speed in the MCDU though.
If I select PreSelect it shows set speed.
Same when flying, HDG mode, V/S, trying to set speed: shows ---. The speed bug changes in the ND as I turn the knob/using "set speed bug" keybind.
So it is flyable, just it won't show selected speed in MCP.