After creating a jail using the 8.3.0 B1 jail PBI I've noticed that the connectivity epair0b will work fine for a while, and then drop for a good amount of time, and then return to functionality after a several minutes.
At the same time FreeNAS outside of the jail has no issues with connectivity. (exit, ping with success, enter jail, unpingable).
At the same time FreeNAS outside of the jail has no issues with connectivity. (exit, ping with success, enter jail, unpingable).