'string data is not null-terminated' when communicating betwen humble and iron instances

[morpheus1820]

When an humble and iron images are communicating, I get this error each time something subscribes to a topic (also happens if both images are on the same machine):

>>> [rcutils|error_handling.c:108] rcutils_set_error_state()
This error state is being overwritten:
  'invalid data size, at ./src/serdata.cpp:384'
with this new error message:
  'string data is not null-terminated, at ./src/serdata.cpp:384'
rcutils_reset_error() should be called after error handling to avoid this.
<<<

Topics seems to be received correctly though. Feel free to modify the issue.