I2C Communication from slave to master

[shreyans]

Hello Everyone,
I am trying to establish a bi-directional communication channel between ESP's using I2C communication. I am having two issues with this:
a. Master is not able to ready any data from slave.
b. Slave can read only partial data from Master; I have increased the buffer size but still cannot read the entire data. The data that I am sharing is a String like "0-[255,255,255]".

I am currently using IDF version 4.3,

If anyone has any information kindly share.