[BUG] Resume on power loss Z-offset

[JungleGim]

Bug Description

Print resume on loss of power does not resume at the correct z-height.

My Configurations

(configuration upload TBD. Using smith3d firmware for ender 3 v2 as of 1/10/21)

Steps to Reproduce

1. pause print
2. power down by toggling PSU switch (& leave for a bit)
3. power back up and select resume on printer

Expected behavior:
-nozzle and bed reheat and print resumes at location last printed

Actual behavior:
-nozzle and bed reheats, print resumes at a higher z-offset, so printing is attempted to resume at a ~+2-3mm Z from the last layer.

Additional Information

Additionally tested this with just a regular pause/resume without a power loss to determine if that feature works correctly. Resume Z-offset is correct when doing just a regular pause.