ros node misses data while subscribed to another node

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Hi,

I am running two nodes, one publishing and one subscribing. My subscriber is being simulated this way:

rostopic pub /motor_msg geometry_msgs/Twist -r 15 '[0.7,0,0]' '[0,0,0]'

My subscriber node seems to be missing some of the published data, regardless of the publication rate. For instance, if I publish "0.7" (like above), my subscriber will, mos of the time print 0.7, but there are some times when my subscriber will print "0." With happens regardless of the value I publish. I set up both subscriber and publisher to the same rate, and that does not help.

What could be the problem in this case?

Thanks