I tested my survey several times and when I open the link in the invitation e-mail, I don't always see the welcome screen. I have 4 questions groups. Sometimes it starts on the welcome screen. Sometimes it starts in question group 1,2,3...
If you use the same token and use "Answer persistence" you will be led to the same place where you stopped the survey before. If that is not the problem, you will need to give a little more information. Help us to help you.
Help us to help you!
Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.