No… Leaves curling up could indicate the pot was to dry. The humidity is fine…I would bring down to the 60 range based on the size.
Since you just flushed her, just let her dry completely out. If the soil was too wet the opposite could be root rot and the leaves will be lethargic (rather than praying) and start discoloring around the edges. Seems more likely based on the info you’ve provided.
Id guess based on the overwatering some most of the roots are yellowish/brown… This will stunt it but new roots will start taking over… Sounds like they are if they are praying again.
This is a very common seedling problem… I have my new seedlings about 7 days from bean drop in earth boxes and have yet to water them. For the first 7 days or so from sprout just use a spray bottle and foliar water if your pot already had moisture lower down. After that start trickling water around the perimeter of the biggest leaves making a circle of water around the seedling but not where the water is touching the stem.
After the plant is on the 3-5th node (depending how fast its growing) start watering the pot to ensure the bottom roots are getting water.
In a 3 gallon - start with about 1/4 gallon and don’t water again till the pot is as light as is was before you put the water in. In a 5 gallon it may require about 1/2 or more to adequately wet the pot the first time.
The next time you water maybe use a compost tea and water it in… Keep it simple (a little kashi blend - steeped - or use blackstrap molasses, aloe, root wise or I would use some Yah-Whey probiotics.)
For the molasses start with about 1/2 oz/gal. All others use as directed. Aerate if possible overnight and water in about an hour after lights on. Your plants will love it. In a small plant I would use it once a week. In a bigger pot maybe every 10 days or so.
About 7 days out of the ground… Only been sprayed with a few squirts (but the soil in the EB was perfectly moist). I want those stems to stretch and stay white for as long as possible.
This auto at 22 days from seed. – I put water in once to this point. From here I started with 1/2 gallon and wait till the bottom is completely dry. Once they start stretching increase to about 1 gal per box and do it again when the bottom is dry. Very simple to water. In smaller pots you will have to dial in your watering skills.
Then if everything goes well at about day 54 from seed… This plant is almost 40" with some nice nugs stacking.
Thes are also 54 days from seed… So stay encouraged as the tent will be smelling quickly with autos. And you can always start another one with it… Generally when an auto stunts it will be a fairly small plant.