That model charger doesn't even have a discharge option.....and since storage mode technically discharges to get it to a certain level, ill assume all the smart technology involved here is taking over to do it all for you...thus no storage mode is needed.
As ive said, im no expert on any of the spektrum smart stuff. It all just seems too easy to go south when you have no options to work with. Id rather just charge batteries my own way the way i want. Charge when i want, discharge when i want, balance when i want, store them when i want.
If the car runs for an acceptable amount of time...ya know, 15 or 20 minutes....then i see no issue here. I have no idea what the blinking light is. I just hope that when youre charging that battery...that you have it in a fireproof charging bag in a place that wont burn any much needed structures down. Blinking lights on batteries are a red flag to me....unless intended to do so.....id be looking into better batteries and a charger.
Thats just me being overly cautious again.