Thanks for creating this, I can confirm that I’m having the same issue on macOS Sequoia 15.4.1 as well and my “Memory Saver” settings are identical to yours also.
This new update seems to ignore any of those settings on that page as a tab will go “inactive” within minutes of me clicking on another one and no way to change it.
I think this might be same thing that is being pushed recently for all browsers and I described it in:
There is a way of turning off manually Tab Discards , but no way to turn off Tab Freeze.
Feel free to check my topic for explanation, but I do not know of any browser option to turn it off completely. This was just pushed and we can’t opt it out.
In short:
“Looking through similar issues I found out about brave://discards/ but those settings reset every time and do not allow me to turn off this option completely.”
This kind of behavior really affects my workflow, and I was hoping for more control over these settings. I’ve decided to switch to another browser for now, as this is becoming too frustrating to deal with, hopefully this gets addressed properly in the future.