possible bug reg Pritanoi skirmishers in campaign

[Not_a_Strategist_yet]

Hello and thanks for this truly amazing mod.

I started a campaign as Pritanoi and noticed some strange behaviour reg 2 units.
In battle the spear throwing animation plays but only a handfull of spears like 10 or 15 are thrown most of times and at times it seems no spears are thrown or they are invisible.

So far noticed this thing in skirmisher unit and sling-spear militia.But the 2nd could be a false positive because I saw it only once. It's definitely happening with the skirmishers though.

The weird part is that if I go to custom battle the spears are thrown just fine.

Could this be a minor bug or is it a problem on my end and I should start seeing if I installed things fine?
I use this mod above MTW gold, kingdoms patch 1.5.

Thanks