Basically yes, it's from an AC86U that I returned. I'll try your idea and report back. Thanks@GregS, did you reuse your USB drive that was running Diversion on the RT-AC68U to the RT-AX88U?
If you did, I would recommend formatting the USB drive on a PC and 'Format JFFS partition on next reboot' to completely wipe out your previous configuration. Make sure to save anything of importance on the JFFS partition first, if needed.
Then, use amtm to format the USB drive to Ext4 w/journaling and create a swap file. Now, do a clean install of the scripts you use, beginning with Diversion.