Having this issue too

Edit: saying the app’s name before the search term seems to work. Ex. Open YouTube to the search page and say “search YouTube for ”

Given the performance difference, I’m actually really impressed how well the 8GB one kept up. Sure, it was slower because it has to spend time compressing & decompressing ram, but it was surprising to see how little overhead that actually cost.

That’s to say nothing of how much Apple charges for more ram, because that’s just egregious.