Upgraded to 1.1.0 RCBugFix. Is my UBL working?

[Roxy]

No! Stay with bugfix_v1.1.0 That has a lot of good stuff that is not in v1.1.0 Please put bugfix_v1.1.0 back on your machine. And do the 'Quick Start' sequence here:
(You can skip the manual probing -- G29 P2 because the G29 P3 is smart enough to handle the unprobed points now.)

https://github.com/MarlinFirmware/Ma...ed_leveling.md

Probably the source of the problem for this:

Followed your guidance here step by step (G29 S1, G29 F10.0 + M500) still it returns "Unified Bed Leveling System v1.01 inactive." for a "G29 W" after a reboot followed by a G28. Is it supposed to be like that?

You should do a G29 A (To activate the system) prior to doing the M500. The M500 will save the current state of the UBL System, and you might have saved the state with it deactivated. Right?

READ: Error:EEPROM checksum mismatch - (stored CRC)33233 != 64164 (calculated CRC)!READ: echo:Hardcoded Default Settings Loaded Hardcoded Default Settings Loaded

A much stronger error detection has been added to the EEPROM storage. v1.1.0 and bugfix_v1.1.0 can not share the same EEPROM data. The EEPROM needs to be initialized for which ever system you are using. Just stay with bugfix_v1.1.0 !!!