MSP430FR2355: SPI Master TX and RX to second MSP430 SPI Slave works for the first transmit receive and fails subsequent ones with an erroneous byte I believe due to USCI42 errata?

Tool/software:

Hi Forum,

I have two launch pads configured to run at 24Mhz connected via SPIsending a random 32 Byte packet from the master to the slave using half duplex transmit polling method, I think the code is falling victim to the USCI42 errata but not sure.  I have tried a bunch of different ways to resolve it with no luck.  

The master is configured as follows

e2e.ti.com/.../spi_5F00_master_5F00_config.c

The Transmit and receive is like this:

      memset((void *)txbuff, 0, PACKET_BUFFER_MAX_SIZE);
      memset((void *)rxbuff, 0, PACKET_BUFFER_MAX_SIZE);

      randomizeData((void *)txbuff, PACKET_BUFFER_MAX_SIZE);

      spi_master_Transfer((void *)txbuff, PACKET_BUFFER_MAX_SIZE);
      __delay_cycles(120000);
      spi_master_Receive((void *)rxbuff, PACKET_BUFFER_MAX_SIZE);

      printf("\r\nTX Buffer:\r\n");
      printBuffer((void *)txbuff, PACKET_BUFFER_MAX_SIZE);
      printf("\r\nRX Buffer:\r\n");
      printBuffer((void *)rxbuff, PACKET_BUFFER_MAX_SIZE);

      send_receive_slave = false;

The SPI receive on the other board is setup using interrupts like this:

e2e.ti.com/.../spi_5F00_slave_5F00_config.c

The first transfer works correctly then all subsequent transfers error with an erroneous first byte as shown in the image below, I have the push button initiating the transfer.

After the first transfer the UCB0TXBUF has 0xFF in there and the next transfer gets that as the first byte.  I haven't found a way to clear it, before the next transfer, resetting the peripheral didn't clear it? Is there a way to work around this issue or am I doing something incorrectly prior to subsequent transmissions?  Any help would be greatly appreciated.

--- George