Changelogs missing information

[Amanda Castro]

Hello everyone,
Consider the following situation:

There's a number field in an issue that initially is set as Null. 
I change the value to 9. Then i change it again to 11. 

The changelog should be like this:

null -> 9

9 ->11

But, consulting the jira API and the history on the issue, we only see the following situation:

null -> 9

null -> 11

In my opinion, this is totally unexpected. It should have an input showing I erased the number 9 and inserted the number 11. OR it should have an input showing I deleted the number 9 and inserted null and then, 11.

Did anyone have this problem? How can I solve it? 

Thanks

[Alexey Matveev]

Hello,

I just check my Cloud instance and it worked as expected.

null -> 9

9 -> 11

Are you sure that you do not have any scripting post functions or something like this?