Every single time I swap spec to heal a dungeon I have to put ALL my abilities back on my bloody bars. I already had to choose between my fricken mount at 40 and paying 50g for dual spec because you’ve forced healers to MS DPS since you’re so adamant you want players only doing dungeons once and out in the world suffering fighting over mob tags.
This should be very high priority.
Not got dual spec yet, so can’t trouble shoot, but, are you using the default Blizz toolbars?
No addons on at all. It’s a well known bug. I don’t think I’ve seen another player who hasn’t had the problem who’ve bought dual spec. It’s even more of a pain in the butt for druids because it literally wipes your cat abilities and bear abilities off your bars too.
It’s so frustrating.
hopefully they get it sorted then, should do if well known. Honestly first I hear of it, only know a couple of people in game that are now dual spec but they have not told me that they were having probs. Not that that does not mean you are. Hope they sort.
Same for me after buying dual spec. Full empty action bars - not using addons, just blizzard default.
Yeah, still happening. Relogging/respeccing, all spells get removed from your bars. Still not fixed. I really hope it’s fixed soon because it’s becoming tiresome.
For me seems to be action bar 6 and 7… not just at respecking but relogging as well.
Yeah, I guess because not enough people haven’t bothered spending 50g on their dual spec yet it’s not a priority.
It’s so frustrating 
There’s an addon workaround that seems to work atm.
ActionBarSaver: Reloaded.
Once downloaded and finished applying all your spells back to your bar, type
/abs save 1