Do you actually prep your coil? Just letting it sit in the pod doesn't really cover it, especially when that isn't even needed.
To prep the coil, put a drop of liquid on each of the lower ports (holes in the side of the coil, 3 or 4 of these are normal on most premade factory coils), as you finish the ports, do it again, they should all be slightly saturated.
Then put 2 or 3 drops of liquid into the center of the coil from the top. You should be able to tell the wicking is slightly saturated, if not, ad another drop or two. If you over saturate the coil, you can simply blow it out from the top, with a cloth or napkin/paper towel at the bottom to catch any liquid coming out.
Put the prepped coil in, fill the pod and vape.
I use a Nord, a Smoat Pasito and several Vinci X's as well as a slue of RTA's and RBA's and I never have to wait and I don't get a burnt taste on any of them (until I suck them dry which I try not to do, but hey, Stuff Happens
)