The fat isn’t the problem, never has been. The carbs were the problem, with those out the fat isn’t an issue. You’re still showing measurable ketones, you’re in ketosis. Don’t get obsessed with the 0.5 nonsense. I lost my first hundred pounds below that number. You’ve been keto for 1.5yrs, I wouldn’t expect you to have “good” ketone levels, most of us doing this long term don’t. You’ve eaten this way long enough that measuring ketones is a waste of money. You know how to eat correctly.
You could be, are you eating adequate protein? Are you working out? I’ve become very good at loosing muscle mass thanks to worrying about a scale number. Took unfucking my brain and cranking up my protein (because I used to be afraid of it) and lifting more to put on more muscle which stopped me loosing it and helped my metabolism. I also have a high stress floor even when things are “good”. Just gotta find ways to manage it. There’s always something that works for you, just gotta find it.
You’re not eating enough carbs to be carb powered, your not on the floor unconscious, and muscle can’t burn fast enough to completely sustain you without you knowing it because you’d be a zombie… You ARE burning it! Again, donate your ketone meter to the trash barrel. Seems that’s a pretty descent stressor at this point.