[ZhekaB]

Hello, Tim!
Your question is a bit complicated. There is not enough information about the combats of La-5 and Hs 129 near Proskurov. All I managed to find:
In this area, operated 2nd Air Army VVS. La-5 were at 5th, 10th IAKs and in 19 IAP. 19.03.44 10th IAK lost 3 fighters (types unknown) and 19 IAP lost 2 La-5. But the reasons for their losses are not specified. Unfortunately, more details on the “Pamyat” site are not visible.
From the interesting, according to the 2nd Air Army documents:
18.03.44 there was an air combat between 4 La-5 of 19 IAP and 4 Ju 88 in the area of ​​Kalinovtsy. By the details of the combat, I can suppose that the Ju-88 is actually Hs 129 (they formed a defensive circle). During the combat, cptn. Shchebeko went with one “Ju 88” in a frontal attack and shot him down, but in this frontal attack he himself also got a light damage from “Ju 88”. In total, the La-5 pilots in this combat claimed 2 Ju-88.
And on 17.03.44 there was a big combat over the Proskurov, when IL-2 and La-5 attacked an airfield. Without a loss, 2 Me 109, 1 Me 110 and Ju 88 were claimed. Me 110 and Ju 88 could also be Hs 129.