After importing an FBX that gets parsed and generates a template, the scale is not correct. Here is a repro with a simple 2x2x2m cube. Adding template to the scene in Editor vs looking at the generated GLB in Viewer:
https://playcanvas.com/project/1195745/overview/template-scale-issue


Note, that the issue is only affecting FBX import pipeline. If a GLB is imported, then the template has a correct scale.