This issue is related to Altium’s wire placement configuration. By default, Altium may use a wiring mode that results in unexpected wire angles and connections. To fix this, follow these steps:
Click on the "Place Wire" button in the toolbar.
When the Place Wire cursor appears. Press Shift + Space to cycle through different wiring modes.
Select the 90-degree wiring mode to ensure clean and structured connections.
Once done, you can achieve a more organized schematic layout and avoid erratic wire routing for the next schematic that will be placed.
