At the beginning, after unpacking the base, some walls are not visible, but if you capture a point and build a castle, then all the walls are built normally. I use bases from BFME I.

*** IF ***
Player '<This Player>' starting position is 1 .
*** THEN ***
Unit 'CASTLE_1' is transferred to the command of Player '<This Player>'
Instantly unpack the free base: Unit 'CASTLE_1'and reference it as UnitRef 'CASTLE_1'.
Can you tell me what the problem might be?