Magnetic Bed
Magnetic beds might have restrictions on Bed Temperature The highest recommended temperature for these beds is 80°C.
After installing the Adhesive Base, heat the bed and check for air bubbles forming between the Adhesive Base and Hotbed. These bubbles might create an uneven print surface. A Nozzle Cleaning Needle, can be used to puncture the bubbles to let the air escape.
Supporting Documentation
Videos:
Wham Bam Flexible Build System vs Creality Cmag vs Buildtak Flexplate
Magnetic Bed Temperature Testing - Creality ENDER 3D Printer