[LongMan]

I ran some test. Not quite sure how to structure it but this is what I did.

I started with a fresh vanilla install of LibreELEC 10.0 based on Lodi 19.1. I not the memory use values and let it sit for more than 30 mins and record the values again. I then upgrade to LibreELEC 10.01 based on Kodi 19.3 and repeat the process. Next I upgrade to MediaImport based on LibreELEC 10.01 and 19.3. I repeat value taking process again. I then carried out the actions listed and waited and recorded again. Hopefully you understand my process.

                                                      Initial (MB)        After (MB)              
Vanilla LibreELEC 10.0.0                   206                 205
Vanilla LibreELEC 10.0.1                   155                 157
MI      LibreELEC  10.01                   158                 158

• Enable MI Repo                       182                184
  
•  Install Emby mediaimporter    300                294
  
•  Add User                                333                334
  
•  Add Imports                           259                670       (at the end of the imports about 20 mins)
  
•  (No further action)                 670              1406      (about 4.5 hrs later)
  

EDIT: After another 12 hours the memory usage is still 1406.