/use doesn't always work

[Szalor]

I have the following macro that used to perfectly work all the time with RoidMacros:

/use Spellstone
/use Wrathstone
/use Firestone
/use Felstone

The macro is supposed to use whatever stone i've summoned as a warlock.

With this addon installed however, something looks janky:

• If i summon 1 stone, any of these 4, the macro straight up doesn't work and doesn't do anything at all.
• If i summon 2 stones, suddenly, the macro works and uses the bottom-most of the list stone, and then also uses the other stone if i recast the macro.

This is extremely odd and looks to me like a bug (since, in situation 1, the macro doesn't work at all, but in situation 2, even after i'm left with only 1 stone, it still works while situation 1's result suggests it shouldn't).