Routalot, that's what we did and they sent over a tech that got us going properly. However I'm kinda bugged by it because the tech did seemingly the same thing we tried the day before, except it worked when he did it, and it didnt' work the day before.
All he did was turn the glue on to reverse rotation, which applies more glue. We tried that the day prior, and the band still peeled off and it didn't have the appearance that the band had been pressed on properly, you could still see the wheel rotation pattern in the glue, rather than seeing pressed glue. He said that he didn't adjust anything else, but there had to have been something acting differently.
Everything we've banded since then has been great, thankfully. What bugs me further is that we didn't need to run reverse rotation last year on 1mm wood, it held very nicely. And, the previous edgebander we had (for 8 years straight) used the same glue application wheel and the same brand/SKU of glue, and that machine didn't even have reverse rotation for an option, and it was always OK.
The glue we are using is Dorus KS351, which according my edgeband vendor and Stiles, is basically the best possible hot melt glue we can buy for our application.