When inserting a vertical pipe/riser nipple with a fraction in the diameter you get atypical results

The fonts for fraction symbols ¼ (quarter), ½ (half), or ¾ (three-quarters) are replaced with ?.840, ?1.050, and ?1.660

The font of your vertical pipes do not match the font of your pipe dimensions

When selecting a vertical pipe/riser nipple hydrapipe, the PROPERTIES window shows "no selection" instead of "hydrapipe"

You may notice that you cannot use the 'change length' command (CL) or cannot rotate riser nipple (RRT)

After editing riser nipples/vertical pipes with the CRN command, the indicator diamonds reappear

Even if you restart the command and cancel, they remain

Glyphs used to indicate the component type (Line/Main/Armover/Underground) that riser nipples are to be listed as remain on drawing even after command is closed

Selecting any button from the AutoCAD ribbon creates the fatal error.  Typing or using a toolbar does not create the error. 

AutoCAD Error Aborting

FATAL ERROR: Unhandled e0434352h Exception at 6C6CCF19h

Sometimes followed by;

The program is missing Tool Palettes and Ribbons.
The drawing may briefly open and then crash.

After setting specific linetypes for your piping, pretty pipes doesn't match the linetype of your pipe.

The pipe noted should show a HIDDEN pretty pipe, similar to the one below it

When plotting to Bluebeam document, some HydraCAD drawing entities show up blacked out.

AutoCAD view;

PDF generated by Bluebeam;

When using 'Publish selected layouts' or doing a batch plot in AutoCAD 2024, the riser nipple/vertial pipe does not display correctly.  It'll either be missing outright or a proxy bounding box will be in its place.  If you plot a single sheet, it works fine.

AutoCAD 2024 batch plot

'

AutoCAD 2024 single plot

When plotting two viewports, one with center-to-center lengths, and the other with cut lenghts, the riser nipples/vertical pipes will show both, even if your layout tab looks fine.

LAYOUT TAB

PLOT PREVIEW