After a user here contacted me with a similar issue and I realized that I did not post any update on this topic.
TL;DR I did fix the board. Kin was awesome and gave me a lot of information on how to fix it.
All I needed to do was to change the first RGB led in the series that started erroring (for me it was LED number 3).
Here is a video showing the RGB Leds with the biggest issues:
Set your LED lighting to light up in a snake pattern: LED1-->LED2-->LED3-->LED4-->etc. If you are using the JigOn tool, select RGB Effect 1:
Watch for the leds that do not light up correctly.
For my case, the most visible errors were generated by the RGB LEDs 5 and 6 but they started on LED3 (it was slowly flickering and didn't light up completely, but my phone camera did not pick it up). Because the RGB led signal is sent in series, starting at LED 1-->LED2-->LED3-->etc, the issue from LED3 amplified itself until it was most visible on the LEDs 5 and 6.
All I needed to do was to
change the first broken RGB LED. LED3 in my case.
So, if you have a very obvious LED erroring out, look closely at the ones before it up to LED1 to see which is the first one crapping itself and desolder it and solder a new one.
Please pay a lot of care changing the RGB LEDs because they are SMD soldered.
If the errors still persist, then you will need to change the the RGB Controller on the board. These 2 chips next to the USB connector:
I changed those 2 chips as well, even If I didn't need to, because I was an idiot and did not pay attention to all the RGB leds, only to LED5 and LED6. I contacted Kin and he was kind enough to send me a new RGB controller.
I hope this will help you fix your Leeku RGB issues too.