thanks for replying. That's not what I want; I've made a new example. The problem occurs only in the first case (with \in[] and \footnote{} in the paragraph)
\setupindenting[big,yes]
\setupdelimitedtext[blockquote][indenting={yes,next},style=red]
% \setupdelimitedtext[blockquote][before=\noindentation,style=red]
\starttext \showframe[text][text]
\startbuffer
\startblockquote
\dorecurse{3}{Is this paragraph indented? It should not!}\par
\dorecurse{3}{Is this paragraph indented? It should! }
\stopblockquote
\stopbuffer
Test \in[someref] test\footnote{footnote}. \getbuffer % not OK!
Test test\footnote{footnote}. \getbuffer % OK
Test \in[someref] test. \getbuffer % OK
\stoptext
Greeting