@Paul, I still do not fully understand or appreciate your comment - apologies and thanks.
What I learned from a little more complicated one is that in the original FB message with the object URL in the FB message then it scans this page, receives META tags and if you have og: url defined it will crawl again . He crawls twice.
In my case, I pass a request that is parsed, but I did not set it again in the og url: therefore, when it crawled my page a second time, it did not collect the request variable that I need it to.
It was stupid of me. Thanks for the great answer.
Jim
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