This MWE is an example of strange font behaviour according to the log and I do not understand what is causing it.
ConTeXt complains "check count_components with mkiv" when the word 'suffi' is present (see log message below).

Now comes the most strange: remove 'suffi' or shorten to 'suff' and the message goes away.
I have put the full set of files inside the zip.

dr. Hans van der Meer

\setupbodyfont[termes]
\starttext
%=================================================================
ConTeXt versie \contextversion \crlf
%=================================================================
this here: suffi (but suff is ok!)
%=================================================================
\starttyping
fonts/mkiv/type-imp-texgyre.mkiv'
close source    > level 3, order 4, name '/Users/hansm/TeX/context/tex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
fonts           > !
fonts           > ! check count_components with mkiv !
fonts           > !
\stoptyping
\stoptext