Hi,
With beta 2021-05-19 I notice that some kerns (usually before ‘v’ letter) are no longer present, not sure if that’s intented change behaviour or not.
Following MWE reproduces the case.
\definefontfeature[default][default][kern=yes]
\definefontfamily[mainfont][serif][EBGaramond]
\setupbodyfont[mainfont, 12pt]
\showfontkerns
\language[fr] % If commented, 2 kerns (che -0.180 v -0.120 ance), otherwise 1 kern (chev -0.120 ance)
\mainlanguage[fr] % If commented, 2 kerns, otherwise 1 kern
\starttext
chevance
\stoptext