Hi @palinopsic, resetCycles has been reimplemented in Tidal 1.9. I don't know if the mentioned bug can still happen. If it can, please open a bug report and I'll have a look.
The implementation of resetCycles is now Tidal/BootTidal.hs at c529f7063f111dceaba4eb7db15da74b025d82f3 · tidalcycles/Tidal · GitHub