Can you please upload the rules condition you have set it for those 2 tables?
check for the commands used at the source side are supported by streams.
Example : RENAME TABLE is not supported by streams.
I have used the tracking feature on the 188.8.131.52 database to see transactions for the tables that are replicating, but never get any information for the other two. That and the fact I do not see the number of messages increase in V$BUFFERED_QUEUES gives me the impression that nothing is being captured for those two tables and it's not even getting to the transformation function.
As per the information provided above the capture process, it seems, is not even capturing the messages.
Please post the output of the following:
SELECT CAPTURE_NAME, STATUS_CHANGE_TIME, ERROR_NUMBER, ERROR_MESSAGE
FROM DBA_CAPTURE where capture_name=<problematic capture process>;
SELECT CAPTURE_NAME, STATE, TOTAL_MESSAGES_CAPTURED, TOTAL_MESSAGES_CREATED, STARTUP_TIME, STATE_CHANGED_TIME
FROM V$STREAMS_CAPTURE where capture_name=<problematic capture process>;
If your capture process is not working properly the error/issue can be determined from these details.