Drobo Gen 2 and Mojave?

My Gen 2 has been acting up since I attached it to an iMac running on Mojave. It will read and write, but I can’t eject it manually, and if it isn’t working, it seems to go to sleep or shut down. The apps I use (Adobe Lightroom and Photoshop) will try to use it and become unresponsive. The only thing I can do is to unplug the Drobo from the power, and then reboot it and it is recognized by my apps until it is unused for an indeterminate amount of time. Is there a fix for this?

It has worked flawlessly when it was running on High Sierra.