Hi Tahir, thanks for the response.
I have no extra plugins. Only difference from the standard is I chose not to include Woo commerce.
As far as formatting, I thought that too so I removed all formatting from the code by saving it as plain text and also as html so I could see clearly that no formatting existed. I have tried copy pasting small amounts and it works a couple times then locks. I have to cancel the process to get out of the dialogue.
I even tried removing all extra spaces and line breaks in the code with the same result.
It is very finnicky and provides no warnings whatsoever.
I have tried Chrome, Firefox, Opera, Safari and IE 11 and all react the same.