First, thanks for your attention, bovi.
And no, I did not do any modding work.
Unfortunately, the problem is not caused by just Spartan Hoplites. After I destroyed the battalion of buggy hoplites, I encountered another CTD after few turns, again in Anatolia by merging armies. This time the army does not contain any weird unit, just Ptolemaic and mercenary ones. I engaged them and they retreated to Ankyra and guess what..CTD