Very long standing bug. Even though memrise has become more reliable saving mems (IMHO), it still lies. The “mem created” notification seems to occur when starting to save the mem. If the creation fails (which is a silent fail by the way), the user has been mislead. Alternatives “saving mem”…“mem creation failed”, or please investigate order of operations. Use transaction locking if you need to give quick feedback while processing in the background. Steps to reproduce: Start creating a mem, switch to another app, switch back to memrise, (memrise silently times out some part of operations somehow?), save mem. “Mem created” notification. Memrise app returns to home screen instead of course plant new mems.
Samsung Galaxy s6 edge. Lollipop.