Why Some ETH Transactions Don't Go Through, Gas, Gas Limit
ETH transaction never shows up or gets processed on the network?
There is simply not enough space in the blocks for the miners to mine all the transactions, and most systems are not currently set up to monitor the massive quantity of transaction requests. This is affecting all people's ability to send transactions, including mine.
There is a workaround laid out in detail on the page that is linked to the headline here above. This page explains the issue and details how you can increase the mining fee by manipulating your GAS and GAS Limits. This is something you will need to go over a few times to get comfortable with because it is convoluted, at best.
Go figure....so what else is new! I have used this information to move my ether around a bit to take profits, but I am not comfortable even trying to explain it here yet. I need to read more and use it more and then I can put it into plain english that is easy to understand.
In the meantime go here