Hello! We recently updated the default units to conform with the Standard units of measurement, and some adjustments need to be made to use assets on new stages.
There is a conversion utility built-in isaac sim to assist with the process:
https://docs.omniverse.nvidia.com/app_isaacsim/app_isaacsim/ext_omni_isaac_unit_converter.html
Changes can be reverted by resetting the stage units to 0.01 again, but I recommend making a back up of any asset you run through the converter just in case.