capture of russian factories

[Icier]

I surrounded Minsk on turn 2 which showed heavy industry & armaments factories still in the city.
At the start of turn 3 still showed it, but when the town was captured later in the turn, they have disappeared.
I know from playing Russian nothing (factories) moves until turn 3, but if surrounded are stuck.
So, what is happening as nothing is showing in the German Production seq or the city info screen?[&:]

[gingerbread]

The HI & ARM have been destroyed, you can't capture those.

[Icier]

I know Guderian mentions the capture of some factories & Speer talks about organising the transfer back to Germany. Would, it cause too
much trouble incorporating the ability to capture the industries say within the first 5 turns & the need to return the industries to Germany within a certain period or otherwise become de-funked.
This would help capture the confusion both sides would have suffered from, at the start of the invasion.