Learn Turkish: İlk kısımda kopukluk var, gerçi yazar bunu düzeltecek. - There is disconnection in the first part, although the author will correct this.

While ama simply contrasts two ideas, gerçi acts as a discourse marker meaning "admittedly," "mind you," or "to be fair." It introduces an afterthought that softens the criticism in the first clause. It shows the speaker is making a concession rather than just abruptly shifting gears.

Can gerçi be placed somewhere else in the sentence?

Yes, it is very flexible. It typically sits at the beginning of the clause that introduces the concession, but you will often hear it placed at the very end of the sentence as a true afterthought: İlk kısımda kopukluk var, yazar bunu düzeltecek gerçi.

What kind of "disconnection" does kopukluk refer to here?

The root is kopmak (to snap, break off, or detach). In the context of a text, speech, or movie, kopukluk means a lack of flow, disjointedness, or a plot hole. It implies that the transition between ideas or scenes feels broken.

Why doesn't the word kısım lose its second vowel here (as it does in kısmı)?

The rule for vowel dropping in words like kısım (part) or isim (name) usually only applies when you add a suffix that begins with a vowel (like the accusative suffix -ı creating kısmı). Because the locative suffix -da begins with a consonant, the root word remains intact as kısımda.