**What is the problem?**

Printer will just stop, may take 10-30 seconds to start back up

**What did you already try to solve it?**

Changed USB cable, verified pi wasn't maxxing CPU usage (7% is max I've seen)

**Additional information about your setup** (OctoPrint version, OctoPi version, printer, firmware, `octoprint.log`

, `serial.log`

or output on terminal tab, ...)

Octoprint 1.3.9, OctoPi 0.15, Anet A8 running Marlin 1.1.9

output from terminal tab when it happens:

```
Recv: ok
Send: N71920 G1 F1800 X102.043 Y123.099 E72.23187*62
Recv: T:205.04 /205.00 B:60.02 /60.00ok
Recv: T:205.00 /205.00 B:59.95 /60.00 @:101 B@:34
Recv: T:204.82 /205.00 B:60.04 /60.00 @:105 B@:23
Recv: T:204.87 /205.00 B:59.98 /60.00 @:103 B@:31
Recv: T:204.69 /205.00 B:60.00 /60.00 @:106 B@:28
Recv: T:204.55 /205.00 B:60.01 /60.00 @:108 B@:27
Recv: T:204.38 /205.00 B:59.99 /60.00 @:111 B@:29
Recv: T:204.33 /205.00 B:59.99 /60.00 @:112 B@:29
Recv: T:204.51 /205.00 B:60.02 /60.00 @:108 B@:26
Recv: T:204.64 /205.00 B:59.99 /60.00 @:106 B@:29
Recv: T:204.55 /205.00 B:60.02 /60.00 @:109 B@:25
Recv: T:204.69 /205.00 B:60.01 /60.00 @:107 B@:27
Recv: T:204.87 /205.00 B:59.99 /60.00 @:105 B@:29
Recv: T:205.27 /205.00 B:60.04 /60.00 @:97 B@:23
Recv: T:205.00 /205.00 B:60.02 /60.00 @:105 B@:25
Send: N71921 M117 Best accuracy*21
Recv: ok
Send: N71922 M117 52.81p complete*82
```

If I hit the fake acknowledgment button, it continues on immediately. it appears the temp feedback is coming thru and hitting before the OK response from the printer for a line of GCODE.