I'm using flyspell mode with aspell under the hood. Emacs 27.1 installed using Homebrew on macOS Mojave. This behavior happens both with my normal configuration as well as emacs -Q.
I looked through M-x customize as carefully as I could in the flyspell and ispell sections, but did not find anything useful.
When I right-click on a misspelled word, I get way more suggestions than I want:
I want maybe a dozen suggestions.
M-x ispell-buffer similarly gives too many suggestions.
This seems like an Emacs thing because running aspell on the same file in the terminal manually gives a much more reasonable number of suggestions (here, 8):


