Well, I've just updated to OS 3.2.3 and my IO Extender (V1) stopped working. I can still re-add and re-link it to the project, the Update Manager still shows the same message as before (attached), but the blinds connected through Serial 1 no longer work. If I connect them to another serial port (EA-5 controller), everything works as expected. If anyone has any idea why OS 3.2.3 would cause this and what can be done, if anything, to make it work again, I'd truly appreciate it.