Hi Andreas
Thanks for posting in the Lucid Community! Based on what you have described it seems like you may have set a Timer when starting the voting session. This option causes the voting session to conclude as soon as the Timer runs out. That's likely the reason why the "latecomers" can't see the option to cast their votes.
If that's indeed the case you can reopen the voting session to allow latecomers to vote by following these steps:
- Click on the Voting tool (three stars icon) from the Primary Toolbar to the left to access the voting session results
- Click the three dots menu at the top right corner of the results board
- Select Reopen voting session from the dropdown menu.

Moving forward if you like "latecomers" to be able to cast their votes I would recommend:
- Not setting a Timer for the voting session OR
- Configuring the voting session to allow it to continue after the Timer has run out by toggling off the Timer Ends Voting option under the Advanced menu.

To learn more about creating and facilitating a voting session please review our article on Voting from the Lucidspark Help Center.
I hope this helps! Feel free to post below any additional questions!