Reverse typing if trying to correct a number

If I have entered a number for example “Example Str. 1234” and I need to change to 5678 the number typing results into 8765. It is no possible to change the number. Anything is getting typed reverse around of a number. Any new entered text, if the address field is empty the is no problen. Changing only letters without a number is working. My phone is an Android type.