Hi,
It is 2 days i have the same flashing wifi and non-connecting bluetooth problem. After long searches I found a diagram that is for LG internal use and for technical people. it shows that the bluetooth and wifi is controlled by the same component. it explains why both are not working at the same time. Here I don't see an option to post the attachment but I will post you the link to download it and also write the part number so if someone wanna fix it him/herself have a guide. it is on page 112.
filesystem:https://mega.nz/temporary/mega/a9USTa4A
if you wanna fix it yourself then please search youtube to how to dissemble and put it back together.
U15012 - wifi/BT module.