DynamicDebuffs: Weird Tooltip ID issue in combination with ElvUI

[sp00n]

I'm seeing a weird behavior when the tooltips are enabled for the debuffs.
The tooltip itself is correct, but the spell ID being shown is the one for the buff with the index of the debuff, e.g. the first debuff shows the spell ID of the first buff, and so on.

Here's an example, I've used %1.name and %1.spellID for the display, so you can see the difference between the displayed and the actual spell ID.
The spell ID displayed in the tooltip is the one for the mount (Invincible).

When I use ElvUI to display the debuffs, it displays the correct spell ID in the tooltip (but I couldn't figure out how to display the spell names).

This might also be a WeakAuras and/or ElvUI issue.

[sp00n]

Interestingly, when checking the box in Weak Aura to show the tooltip for a "regular" debuff, i.e. one that was not set up with DynamicDebuffs, it doesn't display the spell id at all, only the tooltip itself.