bug in powerloss after a pause and resume

[SHBnik]

Requirements

NOZZLE_PARK_FEATURE and POWER_LOSS_RECOVERY must be active

Description

if NOZZLE_PARK_FEATURE is active and you pause, the printer goes to the certain point that you declared in the NOZZLE_PARK_FEATURE and then you resume the process, after that if you cut the power off and turn on the printer, the x and y axis will go to the correct position but the z axis thinks that it is in NOZZLE_PARK_FEATURE's position ( but the actual z position is much lower )and wants to go down to the correct position and it will go to the print part and breaks it .
the problem is this line in powerloss.cpp,:

// Did Z change since the last call?
if (force
#if DISABLED(SAVE_EACH_CMD_MODE) // Always save state when enabled
#if SAVE_INFO_INTERVAL_MS > 0 // Save if interval is elapsed
|| ELAPSED(ms, next_save_ms)
#endif
// Save if Z is above the last-saved position by some minimum height
|| current_position.z > info.current_position.z + POWER_LOSS_MIN_Z_CHANGE
#endif
) {

it checks if the current_position.z is bigger than the info.current_position.z and then save the z position but in the pause process the value of info.current_position.z changed to the NOZZLE_PARK_FEATURE height which is much much bigger than current_position. So the z value wont save any more.
to cover this we have to force the z save method which i mentioned, to save after each resume.

Benefits

if you dont fix this . in the best case it will break the part but the worst case it will goes further and break the bed and damage your z motor and driver.

[thisiskeithb]

You're trying to merge 2.0.x into bugfix-2.0.x which is why there are so many changed files here. You'll want to start with bugfix-2.0.x and merge into bugfix-2.0.x.

[thinkyhead]

Thanks. I have merged your patch directly.