I've upgraded to an ASI174mm mini as guidecam, guiding primarily through PHD2. And I have some very intermittent issues with it: it simply freezes and does not produce an image. PHD2 tries to reconnect, but fails. The only output I get from the log file is this: 

ASI174MM Mini :  "[ERROR] Failed to get data after exposure (1936x1216 #1 channels) (ASI_ERROR_TIMEOUT). "

I have switched USB cables, now running an USB 3-cable directly from the guidecam to the USB3-port on the Raspberry Pi. Interesting, if I go to Indi control panel and manually click on Exposure there, it capturs one frame and then, it works again!! But Ekos can seemingly not "restart" or reconnect. 

Anyone recognizes this?