Issue with V.4.0 and number

Hi there!
I have a problem after the update.

I have some field where people has to put just numbers (like number of partecipant).
Since the update the field is managed wrong: it put a ‘ before the number, (as you can see here: https://ibb.co/fY9kk2N) so it create a problem if I try to sum the number!

I’ve already tried setting the format of the field as number on Google and also selecting “number” as field in CF7, but the problem is still there.

Could you please tell me how to fix this?
Thanks.