I tested this plugin last December. The CRM module was of my special interest. Everything went so smoothly and correctly that I made a choice this plugin for future.
Last week I installed it for some practical purpose and found the problem described above.
It seems very strange. Now messages sent from CRM are in the “Activity” log but then they disappeared. Nobody receives them.
It looks like a very simple and slight malfunction.
I wonder when this problem will be solved.