FX3 DMA Engine hangs(?) with small manual transfers

[mcn]

I have a manual single DMA channel which is dealing with multiple small packets, one at a time. After committing the buffer, the data arrives at the host just fine.

However, I cannot start a new DMA transfer because the previous one is ACTIVE indefinitely.

The setup is:

dmaCfg.size = 96;  // Multiple of 32 required
dmaCfg.count = 192;  // 256 seems to crash? Not sure why, should be plenty of memory?
dmaCfg.prodSckId = CY_U3P_PIB_SOCKET_0;
dmaCfg.consSckId = CY_U3P_UIB_SOCKET_CONS_1
dmaCfg.dmaMode = CY_U3P_DMA_MODE_BYTE;
dmaCfg.prodHeader = 16; // Multiple of 16 required
dmaCfg.notification = 0xffff; // I'll take anything
dmaCfg.cb = funcCallback;
...
CyU3PDmaChannelCreate(&handle, CY_U3P_DMA_TYPE_MANUAL, &dmaCfg);
CyU3PDmaChannelSetXfer(&handle, 80);

In my callback, I get a CY_U3P_DMA_CB_PROD_EVENT:

CyU3PDmaChannelGetBuffer(&handle, &bufp, CYU3P_NO_WAIT);
CyU3PMemCopy(bufp.buffer - 16, &header, 16);
CyU3PDmaChannelCommitBuffer(&handle, bufp.count + 16, 0);
CyU3PEventSet(&glEvents, PROD_COMPLETE_EVENT, CYU3P_EVENT_OR);

Then, in my event handler, I try to queue up my next packet by waiting for the transfer to complete. 

CyU3PDmaChannelWaitForCompletion(&handle, 1000);

But it never completes. The state is ACTIVE forever. 

Is there a better way to handle multiple manual transfers? I'm sure I could completely reset & abort, but that seems like overkill.

Thanks!