1. Is the fan issue also solved in E2?
I am confused about E2 , please describe it clearly.
2.Is the letter in the firmware an indication for the latest firmware? like E2, F4 so the next version will be something with “G”?
NO, it is not the letter in the firmware an indication for the latest firmware.
“like E2, F4 so the next version will be something with “G”?”
I don’t think so.