Hi @pkinnera,
I spoke with my networking co-worker, he mentioned to downgrade to the version 6.6.3.40, you will have to download the 6.6.3.40 firmware version. In the zip file, it contains ONIE firmware installer located in OtherFiles folder. Then boot the switch to ONIE mode. And install the firmware using the file. The instruction document is also in the ZIP file, you can refer to page 12 for ONIE installation.
DELL-Joey C
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell
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