De-targeting and De-enmity Issue for Tanks

If this is supposed to happen, then we could really use a work-around. Pretty please?

There seems to be an issue with the bard/archer/lancer class wherin they can remove target and targeting ability from tanks for several seconds, effectively canceling all enmity and giving reduced enmity abilities when targeting ability and enmity abilities restore several seconds later.

This issue is not a constant and I used to think it only happened for my tank and was due to my playing ability, but now that my Husband Sazi and I are doing dungeons with large parties daily, I am noticing the issue nearly every time. It not only happens to me, but to other tanks as well.

The red circle of targeting disappears and our ability to target the enemy or enemies as a tank is removed for several seconds. This move the bard/archer/lancer does also destroys all enmity and when targeting abilities are restored, enmity abilities seem greatly reduced.

We tanks are receiving a lot of harassment from DPS classes telling us we are terrible tanks. I'm not the only tank that has the issue, others in large parties also are getting harassed . We are told to "learn your class", just because of this seeming glitch. And we try to inform Dps that one of them has the ability to prevents us from targeting enemies and getting any agro on them for several seconds, even if we have full agro and are completely targeting an enemy (red circle) right before the DPS person uses a move, takes all agro completely, and then gets angry they have it.

We would love to know if this is supposed to happen or if this is a glitch that needs to be addressed. On most dungeons runs, (even fate runs when we are not in a party with the Dps who is also doing the fate AND if a DPS comes up and starts fighting an enemy I have already gotten down to half life before they showed up!), this de-targeting and removed enmity issue happens, but not always and we have no idea if it is directly due to a specific ability the bard/archer/lancer has to if it really is a glitch.