High RAM Consumption in GIMP

[Dunham]

This week I noticed my system was crashing when I used GIMP. So I monitored it with the Missions Central application and discovered that GIMP was using 9.5GB, even though I wasn't doing much editing. Today I'm using GIMP 3.0.4 and Linux Mint. I noticed that just opening GIMP consumes about 5GB.
I managed to solve the problem as follows:

I went into the preferences section and made some changes to the system resources section, as follows:

Minimum number of undo levels: 10
Maximum undo memory: reduced to 1024MB
Fragment cache size: reduced to 1100MB
I left the other settings as they were.
This reduced RAM consumption during editing, but when opening GIMP it remains at 5GB.

For my current tasks, I haven't noticed any significant performance losses yet. Regarding GIMP opening with 5GB, although I'm not sure, I think it's due to having the following installed:
GMIC Plugin
Resynthesize Plugin
Remove BG Plugin
Several extra brushes
Thank you
My question, however, is this: is it normal to have this %GB consumption only when opening GIMP?
Are the settings I made in preferences relevant?
Here's my machine:
Acer Nitro 5 AN515-45
RAM: 16GB 3100MHz
Processor: AMD Rysen 7-5800h with integrated graphics
Dedicated graphics: RTX 3060