How to understand where could be an issue?

My page is crashing after some time on Azure.
I have this snapshot summary:

Then I check Gen 2, and as far I understand we are looking for the one who is consuming the most memory or amount of instances:

I clicked System - Byte[] instance categorizer, since it was consuming most of memory and got:

Instance retention graph:

I have no idea how to work through this here and come to my code and resolve issue in code.
I have this snapshot summary:

Then I check Gen 2, and as far I understand we are looking for the one who is consuming the most memory or amount of instances:

I clicked System - Byte[] instance categorizer, since it was consuming most of memory and got:

Instance retention graph:

I have no idea how to work through this here and come to my code and resolve issue in code.