That is exactly what my tough print just did. I have printed with tough for about 40 parts spread over about 10 prints and never saw this till the latest firmware update. I cleaned everything, filtered the resin, etc, and the next trial only went one layer before I had to stop it. It had peeled the layer half way off the build platform, it was not properly cured, it had the constancy of a wet noodle. Please see my other posts for details.