Unable to copy Digits/Nummbers in iPhone 5. IOS. 7.9.4

Unable to copy Digits in iPhone 5, it suddenly closes the window and I'm unable to copy digits. I must copy atleast 1 letter to make it happen. I have reinstalled software a several times. It looks like the bug remain the same. It's irritating.

Please do something about it. I have a busniess where I have to copy and paste a lot of numbers. It doent work anywhere. You need to make space in numbers or write a letter to copy only nummers.

Regards
Khaver S. Khan