Just started researching this issue today after I was notified by my users.
@skyzlmt Thank you for this. I’ve seen this discussed in a few places and was hoping at some point we’d get an option to set this remember me setting instead of modifying the code. 
Patreon Dev Team (@codebard):
Would it be at all possible to just do this as an option in the plugin settings so this stops being an issue or maybe even give the user an option when they hit the unlock button? I don’t want it to be session based, I want it to be a normal login that remembers or at least have the option to without having to modify the code. I’m using a very vanilla PHP setup (virtualmin install) and my users have all mentioned this constant logging out / in issue to me with all kinds of different browsers (Android Chrome and iOS Safari at the very least). Regardless of why it might happen, wouldn’t it make sense to just give the option in the plugin settings for the sake of making this easier? People are all working in different environments for different reasons and this would be a way to put that issue to bed.
As it is, I’ve modified the plugin and now I’ll have to redo this every time I update. It’s a free plugin so I’m not going to complain (I absolutely love this plugin and am EXTREMELY grateful for it), but I feel like this would really cut down on some headaches for people if you were willing to make the change.