@baris Yes, two weeks ago we have upgraded to 1.18.6 from 1.13...
But we have used Cloudflare while setting up, and it did not work well with the forum (https://community.nodebb.org/post/86544) , then last week we have re-installed the forum without Cloudflare...
many users were having connection problems including us with CloudFlare... that is why we had to remove it. After the update (for the past 5 days) so far, several users have complained about this yet, but usually, when someone mentions about a problem, others just wait until the problem is resolved, so I do not know how many people are having the problem.
Additionally, before the upgrade... when you visited the forum on mobile, leave the app (Safari), and then when you come back to the forum, your account was still logged in, however after the upgrade when you visit the app, you are automatically logged off each time.