Addy, we believe we had a similar issue - in our case we saw a web page visit but everything came in with 1+ hours delay. did you eventually get all the information in the Activity Log? We did look at the Munchkin Code and there was no issue there, this was also confirmed by Marketo Support. We monitored this for a few hours, but the next day it worked again, and we can still only speculate about the root cause.
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