Stock 5.0.2 secondary ROM doesn't work on MultiROM v33 (Nexus 7 2013)

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I have a Nexus 7 (2013) WiFi (flo). The internal ROM is stock 6.0.1 with MultiROM v33. The secondary ROMS are stock Stock 4.3, 4.4.4, and 5.0.2, and 5.1.1. They all work perfectly, except 5.0.2. The ROM boot fine, but the System UI is completely missing (no status bar and no nav bar). And the Play Store will download, but wont install updates.

Until recently, the internal ROM was Stock 5.1.1 with MultiROM v32a, but I upgraded the internal ROM to Stock 6.0.1 with MultiROM v33. I know that going from 5.x to 6.x there are changes to the userdata partition for multiuser support. So I backed up my secondary and internal ROMs in recovery and copies the backups to my PC. Then, I did a clean install of Stock 6.0.1 including the userdata partition and installed MultiROM v33. The 5.0.2 ROM worked fine on MultiROM v32a, but does not in MultiROM v33.

I thought maybe that my backup was messed up. So, I deleted the 5.0.2 ROM and did a clean install from the flashable zip provided by Tasssadar. The fresh install has the same problem, no System UI. I redownloaded the zip from basketbuild in case the download was corrupt, but nothing changed. Does anyone have any idea what could be happening?

[ben-page]

I took my fully functional 4.4.4 ROM, copied it, and flashed 5.0.2 over it. No System UI.