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AM3357 resets after timeout with JTAG connected

I am encountering an issue that has not occurred in the past and am hoping someone knows what might be happening. In order to bring up my boards I've followed the procedure:

1. Connect JTAG (Spectrum Digital 560v2)

2. Open CCS and connect to target

3. Tools > Load Memory and select my u-boot spl file

4. Click run and see a u-boot SPL message on the serial terminal

5. Run > Load > Load Program... and select my u-boot binary

6. Click run and see u-boot start running in the serial terminal

I used to be able to wait in between steps indefinitely, but I've just started encountering an issue where the CPU will appear to reset because I get CCCC's if I wait long enough at steps 3 through 6. I recently updated to CCS 6.1.2, if that might be an issue.

Has anyone encountered this before? If so, is there a way to prevent the automatic resetting after a timeout?