Just converted from a router to a spindle on my AVID CNC and the MDI input feature seems to have changed. When I had the router I could place GCode commands (mostly M3 & M5) into the MDI input area and see all executed. Now with the spindle in place (PMDX-126 & PMDX-107) I can input multiple speed change settings but once I input an M3 the MDI input is locked and I have to use the disable button to turn off the spindle. All these MDI inputs were part of the integration and troubleshooting process. Anyone know what's causing this?

Thanks