This bug only came around during the latest preview patch (NW.100.20180514A.2). Bug: Bonding Runestones will not proc, despite pets clearly attacking enemies and the pet clearly being equipped with Bonding runestones.
Given how many players rely on Bonding runestones, the dev team needs
to fixed as soon as possible, lest you have a ton
of unhappy players.
Here is a video that showcases the bug:(Yeah yeah my internet upload speed is slow, sue me. It'll pop up Soon[tm])
1. Take any Bonding Runestone(s) of any quality.
2. Equip on Pet.
3. Go find a training dummy or any enemies.
4. Take note of stats.
5. Attack/trigger combat.
6. Check stats and check the buffbar. The buffbar will not display the usual Bonding Runestone procs and there will be no stats transferred.