Many AutoCAD users have custom linetypes with embedded text. We use these lietypes to help visually identify what the line represents. Here is an example of an existing water main with the text “Water” in it.
Custom linetype going the wrong way.
Here we have a situation where two lines meet but the linetype text is upside down in one of them. The issue lies in the direction of the line. These two lines are LINE objects they are not joined polylines.
One way to fix this is to rotate the line with the upside down text 180 degrees but that might not be practical. If the line that is upside down is not a line but a polyline made of several segment then rotating is out of the table. If that is the case then just and use the REVERSE command.