This is GDI mode restriction.
Most TC tools use operation GDI XOR while dragging. See Wiki GDI XOR
It dramatically speeds up drawing, but if objects match (rectangle + selector box), then after operation objects become invisible.
"Show object while dragging" make rectangular objects disappear Print
Created by: Ehtisham Mehmood
Modified on: Mon, 10 Jun, 2019 at 3:35 AM
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