Vinyl... ANY vinyl be it reflective or not has three "set" times.
1) Tack time - the time to adhere and allow removal of application tape
2) Dry - time - the time that it takes for gravity and pressure to take affect and allow most fluids to make it's way out to normal air pressure ( hence the reason why air pockets and bubbles of fluid form from many small into one large)
3) Absolute Dry - When all fuids and air have been secreted between the film and the substrate.
Depending on the time of year - humidity, temperature, heat / cool time frame ( obviously in summer the temps come up quick, last longer and cool slow - the reverse in winter) and the cleanliness or receptivity of the substrate, the planets must "align".
I would have suggested in summer shutting down the wash for at least 24 hrs and in winter 48 hrs minimum. This could be reasonably done on a Monday say when required useage would have been much lower compared to weekends.
Do the right thing, remove, replace, SHUT THE CAR WASH DOWN and save face and a client, and never have to worry about fixing it again.
When the blade cuts reflective it stretches - oh so slightly, making it want to curl. Poor adhesion will make it want to return to its weakest shape. That's why it curls rather than jusrt lifts. ALWAYS.
Cheers - G