OK, so you see from the 'save' it's what you want to do, and the 'cancel' is when you want to stop. At that point (after you clicked save) if you clicked 'connect and download' you'd see 'Puff Saved, Playing' has been enabled by YOUR MOD. Replay ONLY captures what your last puff tasted/heated. Nothing to do with duration at all. For wattage and duration you want 'session mode'
Yup. At most you can uncheck that, otherwise there is no 'puff' for it to recreate. For the third time 'Your mod toggles that 'playing' on and off.
Not a faulty chip, there are YT videos on how to use. What training video did you find? There never was one (by evolv) for any color mod. On YT all 75C/100C/250C's operate the same. Or search here for more info on session mode.