It appears that 29c78ce changed `:defer t` to be the default for
use-package, and that previously the `treemacs` and
`treemacs-projectile` packages in treemacs/packages.el specified `:defer
t`, but *not* `treemacs-evil`. Restoring `:demand t` (previously the
default) to `treemacs-evil` appears to fix#10422.