Glitch in editting the submitted form

I sat to edit my submitted forms in the KoboToolbox. There are many blank fields which I need to fill before exporting the files, When I am entering a number into the field, suppose 1000, it gets self-editted to 999 or say 1003, any random number. It’s not retaining what I enter. What is this glitch? How to get past this?

Welcome to the community, @sweta_tripathy123! Could you kindly share with the community the relevant part of your XLSForm so that we could also test the same at our end? Please also let us know the server you are using. That would be helpful for us when troubleshooting!