Spellthief Proc on Nami's Ebb and Flow bounce back

If you build on there's a scripting error, or maybe intentional scripting, that prevents "Tribute" when Ebb and Flow hits enemy targets after the first target.

Here's an illustration on Tribute Proc for Nami's W:

Enemy > Self > Enemy Tribute > N/A > no Tribute

Self > Enemy > Ally > Enemy N/A > no Tribute > N/A > no Tribute

The only time Ebb and Flow procs Tribute is when the first target is an enemy, and you only gain Tribute for that enemy hit.. if the W bounces back and to another enemy, the other enemy doesn't proc Tribute. If this is unintentional, can we fix this? If it was intended, then why..? It seems like a very specific/un-needed nerf among AP support options right now.