Convinving Infiltrator/Grave Rune/Freezing Trap

[Pagios-1477]

I assume its a bug:
Game of Hunter vs Priest, me playing Priest. Standard Ranked Play.
I summoned a Convinving Infiltrator on which I cast a Grave Rune spell, so 2 copies would be summoned upon its death. The Hunter had a Freezing Trap secret active and my Convinving Infiltrator attacked the Hunter and returned to my hand. I could not then summon the Convinving Infiltrator, although it showed 7 mana cost, which was reflected on the mana bar, as shown in the screenshot below. I unsuccesfully tried to use the card on at least 2 rounds.
The only thing I can think that went wrong is a mixup on the value of the card due to Grave Rune. This however does not agree with the mana value mentioned on the card or the mana bar.

[anon43486798]

Unplayable minions due to Freezing Trap has been reported and is a Known issue.

Help by searching first before posting to reduce duplicate issue threads.

There is a possible workaround:

@Kerfluffle-11372

We’re working towards a fix for this in the future, but there is a workaround in the meantime—while clicking on the card does nothing, you can drag on the card in order to play it.