It's probably nothing, but the end of the third movement of Steinberg's 1st string quartet in A major (1907) (available in recording and parts on IMSLP) sounds for ... 30 seconds? more?... not quite sure... very similar to an almost corresponding moment (give or take orchestration!) in a symphony written by Nicolai Myaskovsky (symphony no.2, op.11, C-sharp minor) written a few years later- except for key, and the fact that the Myaskovsky follows the extended and elaborated cadential passage with a gradual increase in tempo attacca into his finale (a section that anticipates a theme and themelet prominent in the latter.) Myaskovsky knew Steinberg's music, or at least he did awhile later when he arranged several Steinberg works (symphony no.3, a tone-poem, at least) for piano 4-hands I think, and when he dedicated his own 11th symphony to the other composer. No idea if he knew Steinberg's quartet, though.
Another example- Schmidt's 4th symphony, an important cello melody (main slow section, slow 'movement' if you like, main theme) - and an earlier work by Hans von Bülow - was discussed without a firm conclusion in this forum awhile back...