In a case of poor network or maybe your network becomes unavailable while typing, it is advisable to copy what you are typing before refreshing the page otherwise you will lose the whole content of what you're typing, and in a case whereby you are done typing and you hit the post button and the network goes of what you need do is keep refreshing the page rather than using the backward key as you may also lose the whole content of what you typed.
If the network is not good and it brought up an error page, I do not refresh, I use the backward key once and it will take me back to my posts. From there I will copy it to my device clipboard. I can do that on both my phone and laptop. The only mistake is when I mistakenly remove the whole link from my browser, but preview can help during such time.