I have three bridges in the plugin currently, and was trying to set up some new indigo actions, but Alexa was not able to discover the new devices (that were mapped to actions). I tried reloading the plug in, disabling and re-enabling it, placing the actions in different bridges, but nothing helped.
Then I tried creating a brand new bridge and placing a test action on it to see if that would work. Not only did it work, but Alexa also discovered all the other actions it had previously been unable to see on the existing bridges.
I deleted the new "test" bridge and everything is still working as expected.
I thought I'd post this here in case someone else bumped up against it.