Hi Sahkan,
I’ve still not been able to reproduce this issue on my end.
I’ve setup several rows of the basic cube and even scaled them as you’ve indicated from your test.
Here are my results:
Would you be willing to share a blank project this can be replicated in? If you only use the basic cube (with plane white material) from the modes panel in the top left you can just attach a map and I can see if I can see the same results. A project would be better if you can replicate because then I can see if it’s something in there.
It’d also be good to know what your lighting settings are set to, your world settings, and anything that is not set to default. All of my settings are default and I’m not able to replicate. Even adjusting the settings to see if something randomly appears has not worked.
Let me know.