'do not ask for code for 30 days'/ featured borked

So, I've been logged out a number of times in the space of 30 days. It's meant to keep you logged in for 30 days, and not ask for the code, but keeps logging me out within that time, and then asking for the code again.
It's not a huge issue, just annoying, cause half the time the code will reset halfway through entering it, so you go back and type the new one in, and then the login thing decides you took too long, and you have to start again.
I've pretty much started waiting until it gets a new code and then logging in, which is a pain. Especially on my phone or tablet, cause have to juggle devices/ windows, and struggle to type on that (mostly the tablet, because big ass keys)

i get logged out about twice a month and need to log back in
someone else said they had been logged out twice in a week

this is with out any code, 2 step
just normal login ins