Opensondage - "extralarge" survey page makes it difficult to answer

What type of hardware are you using: VPS bought online
What YunoHost version are you running: 11.2.22
What app is this about: opensondage

Describe your issue

Hi,
I installed OpenSondage on a server and the datepicking creation is running, but once created, when people try to choose their options, something annoying happens.
I’m not sure about what triggers this event, but after 6 or 7 clicks on options, and/or after you click on the right arrow to show more future options, if you try and click on another option, the page shifts to the right, and you find yourself on a white page, but in facts you’re in the middle of a superwide page, where the sondage is on the far left, and there’s nothing on the right part, for at least twice the width of the very poll.
I’m sorry if I don’t know how to explain myself better, but I’ll try to be clear on the steps to reproduce:
Install OpenSondage;
create an event (i don’t know the english or french name, I’ve installed it in italian);
give more than 15 possible options (this will make the poll larger than the “view”);
try to fill the sondage as a user;
try to select an option after using the right arrow…

(I think that the problem is the width of the list of choices, it doesn’t “hide” at the limit, it just “continues” unseen as wide as you need it, and since we need to choose among many hours and many days, the page gets wider and wider)

Share relevant logs or error messages

It’s not an error, I don’t have a log to show, or at least I don’t know where to find something useful to show