ifKit dropping out

[berkinet]

I have a 1203 ifKit (without the display) that has started to exhibit it an odd behavior. At times, when I turn on a digital output the ifKit just drops off line for a second, and then comes back, with all I/O reset. It is hooked up to a RaspberryPi and on the Pi I can see the the USB port disconnect and reconnect...

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Jan 10 17:34:08 CasaMilagro-Poulailler kernel: [  148.722214] usb 1-1.5.4: reset low-speed USB device number 23 using dwc_otg
Jan 10 17:34:10 CasaMilagro-Poulailler kernel: [  150.682300] usb 1-1.5.4: reset low-speed USB device number 23 using dwc_otg
Jan 10 17:34:12 CasaMilagro-Poulailler kernel: [  153.328802] usb 1-1.5-port4: disabled by hub (EMI?), re-enabling...
Jan 10 17:34:12 CasaMilagro-Poulailler kernel: [  153.329184] usb 1-1.5.4: USB disconnect, device number 23
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.632410] usb 1-1.5.4: new low-speed USB device number 24 using dwc_otg
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.772457] usb 1-1.5.4: New USB device found, idVendor=06c2, idProduct=007d, bcdDevice= 1.17
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.772476] usb 1-1.5.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.772489] usb 1-1.5.4: Product: PhidgetTextLCD 8/8/8
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.772498] usb 1-1.5.4: Manufacturer: Phidgets Inc.
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.772508] usb 1-1.5.4: SerialNumber: 67356
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.778911] hid-generic 0003:06C2:007D.0025: hiddev96,hidraw0: USB HID v1.10 Device [Phidgets Inc. PhidgetTextLCD 8/8/8] on usb-3f980000.usb-1.5.4/input0
Jan 10 17:34:13 CasaMilagro-Poulailler kernel: [  153.799913] hid-generic 0003:06C2:007D.0026: hiddev97,hidraw1: USB HID v1.10 Device [Phidgets Inc. PhidgetTextLCD 8/8/8] on usb-3f980000.usb-1.5.4/input1
Jan 10 17:34:13 CasaMilagro-Poulailler mtp-probe: checking bus 1, device 24: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5.4"
Jan 10 17:34:13 CasaMilagro-Poulailler mtp-probe: bus: 1, device: 24 was not an MTP device

My guess is this is being caused by a power issue. But, the ifKit is connected to the Pi by a USB hub and is not being powered by the Pi. There are three sensors connected to analog ports: humidity, light and temperature. No other outputs are enabled when this problem happens and it only happens when an output is enabled.

Any ideas?