Tabula Rasa Vault has posted a Q&A entitled: Response from March 1st Mini Report. Here's a snip:

- Controlled Fission -

This has been an issue since at least 1.3. In PvP, if a target is affected by Fission and is KILLED by Fission's discharge, the target will be affected by what some call the "armor bug" or the "Fission bug". Armor will completely stop regenerating naturally, but can still be healed by boosters and tools. This happens EVERY time a target is killed by Fission. Health and power seem to completely stop regenerating naturally too. Relogging is the only way to fix this. People have /bugged it for a while now but it has not been fixed, nor mentioned as a known issue in any patch notes.

Dev_Harleyquin: This has been fixed in 1.7.

Check out the rest at TRV.