Hi,
I think we've found a bug in AdWords API v20806 behaviour. In this version, fields like: Headline3 & Description2 are not supported. However, while editing an Expanded Text Ad via API (it is possible to EDIT ads in this version whitout recreating them - adID remains the same), AdWords drops these two fields! As they are not supported by this version of API they *should not* be changed/touched/affected in any way.
I'm aware they are supported in v201809, however it should not be like this in v201806. It simply breaks ads...
@API team - could you please fix this?
Best regards,
Robert.