Solid Hatch Not Displaying Correctly

I still use a genuine (dongled) version of AutoCAD14 at home (yes, I know -
but I like this version

I have just drawn a fairly complicated logo (crest) to use within a drawing
sheet title block. The logo was outlined using splines, circles and arcs
and then some areas were filled in using different coloured solid hatch.

The logo is a block that is embedded within my drawing sheet block.

I have a Lisp routine that updates the drawing sheet with the new logo when
an older style drawing sheet (with a different logo) is opened.

Generally everything works just fine and the new logo displays and prints
perfectly. However, occasionally when I open a drawing and allow it to
update the logo, some (not all) of the logo solid hatch is missing. If I
then print the drawing sheet, the solid hatch is still missing on the hard
copy.

If I regenerate the drawing using 'regenall', the logo remains unchanged and
the logo solid hatch is still missing as before.

Only two actions seem to correct the logo missing solid hatch:

1. Zoom in close so the logo is full-screen and regenerate the drawing -
then the logo appears with all the solid hatch present and remains so if I
zoom back out.

2. Go into Tools/Options (Preferences)/Performance and set 'Arc and
circle smoothness' to a higher figure (e.g. 4000). Clicking on 'Apply'
causes the logo to regenerate correctly and for all the solid hatch to be
present.

My default 'Arc and circle smoothness' setting is 1000. Increasing this
figure to 2000 sometimes causes an incomplete logo to show correctly, but
not always. Increasing the figure to 4000 has (so far) always caused an
incomplete logo to show correctly.

Any suggestions (apart from upgrade to a newer version of AutoCAD)?

TIA