Current released OctoPrint, on a Monoprice Mini Delta (aka M300). Fairly consitently I get a timeout/disconnect when the printing is done. Here's the serial.log output when this happens:
2018-06-23 21:50:30,255 - Send: N6907 M84*39 2018-06-23 21:50:30,259 - Recv: ok N6907 P15 B15 2018-06-23 21:50:30,264 - Send: N6908 G4 S420*95 2018-06-23 21:57:30,240 - Recv: ok N6908 P15 B15 2018-06-23 21:57:30,250 - Send: N6909 M107 S0*80 2018-06-23 21:57:30,255 - Recv: ok N6909 P15 B15 2018-06-23 21:57:30,287 - Changing monitoring state from "Printing" to "Operational" 2018-06-23 22:01:30,455 - No response from printer after 3 consecutive communication timeouts, considering it dead. Configure long running commands or increase communication timeout if that happens regularly on specific commands or long moves. 2018-06-23 22:01:30,466 - Changing monitoring state from "Operational" to "Offline (Error: Too many consecutive timeouts, printer still connected and alive?)" 2018-06-23 22:01:30,477 - Connection closed, closing down monitor
This might end up as an Issue but I figure it's worth putting here first.