You could add a Function block with a delay, or simply an Element Action block with a "WaitForElement" action, so that it waits for a specific element to be displayed on the page.

For problem #2 you can use \\n to send an actual \n character instead of a like break.
For problem #1 I can't do anything with the information you provided.

Cookies are always emptied when you rerun the debugger. Same in the Runner when a bot finished a check.

I don't think that's possible to do right now, because the user agent is specified through a command line argument when the browser is opened. So that would be a thing that I need to implement in the code itself. Please open an issue on github or I will forget.

I don't know honestly

https://openbullet.github.io/usage.html#environment
https://forum.openbullet.dev/topic/8/environment-ini-a-common-problem

Environment file

Stop asking this question, really, it's been asked a thousand times, it just takes a small search

Then it's sent to you in some request. Maybe look in the source when you GET the login page there might be a small javascript script with a token parameter initialized, so you can parse that one

The token is given to you AFTER you login, not before. You don't have to send it in your login request, if it sends a token there, it's a badly configured application.