20-30 second delay between Publish and arriving at subscriber Action

[chrisriesgo]

Hi. I occasionally see an issue (using TinyMessenger in Xamarin.Android) where I'll publish a message, but the message won't arrive at its subscriber for 30 seconds -- sometimes longer. Any thoughts on why this might be happening? I ask because I'm publishing a message and expecting a UI element to appear when the subscriber Action executes.

Again, this only happens occasionally. Usually, I publish and the subscriber Action executes almost immediately.