Why would all the conditions I set be randomly deleted from my form?

Can you explain maybe a possible reason why all my conditions from my form would have been deleted? Or could this have been a random glitch? 

Hi, 

Can you provide me your form link, to I look at your conditions?

Thank you.

Sorry, never mind... We looked into it and found that they'd been deleted manually.

Just in case, there is a Revision History tool available that may be used in order to rever the form to one of its previous versions:

How to View Form Revision History