Flashing hostname

[trocalos]

Hello,
I am trying to use Veyon in my institute.

My educational center has dynamic ip's so in a few days I stop seeing the screens of the students. I have tried to enter the hostname and although, at first it took a while to see the screens but they were seen, especially the same day that I entered the hostname, after a day those screens were no longer seen. But I must also say that at some point the
of some students and other days no screen is seen.
Is there a feature or a manual that explains whether any option should be taken into account?
Thanks!