Thank you for the replay.
Data loading:

Each dataset has access to preloaded lidar point cloud, saved in frames. during run time - the relevant frame is returned. All data from all dataloader fits in memory (I thought it was a memory loading issue… but no such luck)

Dependency on specific dataset:

I’ve tried checking for a specific dataset, but found no correlation.
Also tried duplicating a single dataset for N (e.g 30) times, and was able to reproduce the effect.
Now trying to see if larger N for single dataset duplication would lead to longer delay.

A bit lost with the next testing direction though