Why does Premiere Pro still need to load full res media when working with proxies toggled on?

I don't have a ton of experience working with proxies, so I'd like to think I might just be missing something here. 

For this project I have my original full res media on a 8TB GRAID HDD, and my project files, sound, and proxies on a (much faster) Samsung T7 SSD. My hope was that this would ensure very speedy cutting and the GRAID would only really start up if I needed to output or toggle back to the full resolution to check something. However, while I do notice that most of the time playback and cutting are fast, when I need to jump around in the project and/or load a new piece of footage into the source browser, premiere stalls on loading the clip. Moreover, during this stall, I can literally hear the GRAID start up its discs from idle, and then after a few seconds the media loads just fine. But my confusion lies in that why would the HDD need to start up in the first place, if I only am using the proxies that exist on the T7?

Is this a bug? Or is there something with my setup I can adjust? Should I literally just disconnect the GRAID and do this more old school?

Premiere 25.3.0

2023 Mac Studio M2 Max

96GB Memory

Sonoma 14.7.6

Thanks in advance!