I also think that this is done for safety
Yes it sure is as they have been hacked twice now so they really want to help protect their members with this automatic log out after 30 minutes. As I said once the exchange grows then we could see the option for members to have the time longer but at the members risk. I think its something the team can think about in the near future.
i hope because now is impossible to use, today i have login 9 time, add 9 time a captcha and 2fa, because market are very low volume and i don't see if my order is close or not. all exchange have login time 24 hour and don't have problem