I experienced some first layer problems. The print turned out excellent otherwise. I printed this from the Bambu Handy app. I was using the generic PLA profile on my P1S. I cancelled this first job (first picture), and then let it run its course on the second job (second picture). Would be open to troubleshooting from the community. I appreciate the design and will still use it.
Sorry you had some issues on your print.
I am relatively new to 3D printing, so take this with a grain of salt. I've seen similar adhesion issues in my machine where I touched the buildplate and got skin oils on it. After a quick plate scrub with mild soap and warm water and dry with a lint-free towel my issues went away.
Very useful poop catcher. I affixed some Velcro to the back of the printer and to the bin as my printer is supported by a paver - this way the placement can be adjusted as needed.