Container docker installation - can't sync image folder

Setup on docker with linuxserver.io:latest

The issue you are facing:
I moved a document folder from another position of the nas to the nextcloud directory and run updatefiles --all that correctly synced all but a big photo/video folder containing a lot o files and I can’t figured out why.

Seems to me that nextcloud couldn’t display that amount of data. Anyone facing this issue and ideas for solving it? Thanks