The pierce delay is in both video’s the same: -1 -10 +1 +10

G codes of the one that works:

(v1.6-sc)

G90 G94

G17

G21 (Units: Metric)

H0

G0 X149.744 Y35.956

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z1.0 (Pierce Height)

M3

G4 P0.5

G1 Z0.1 F100.0 (Cut Height)

H1

G3 X150.0 Y35.7 I0.256 J0.0 F1550.0

G3 X174.3 Y60.0 I0.0 J24.3

G3 X150.0 Y84.3 I-24.3 J0.0

G3 X125.7 Y60.0 I0.0 J-24.3

G3 X150.0 Y35.7 I24.3 J0.0

H0

M5

G0 Z25.4

G0 X179.744 Y26.956

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z1.0 (Pierce Height)

M3

G4 P0.5

G1 Z0.1 F100.0 (Cut Height)

H1

G3 X180.0 Y26.7 I0.256 J0.0 F1550.0

G3 X183.3 Y30.0 I0.0 J3.3

G3 X180.0 Y33.3 I-3.3 J0.0

G3 X176.7 Y30.0 I0.0 J-3.3

G3 X180.0 Y26.7 I3.3 J0.0

H0

M5

G0 Z25.4

G0 X179.744 Y86.956

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z1.0 (Pierce Height)

M3

G4 P0.5

G1 Z0.1 F100.0 (Cut Height)

H1

G3 X180.0 Y86.7 I0.256 J0.0 F1550.0

G3 X183.3 Y90.0 I0.0 J3.3

G3 X180.0 Y93.3 I-3.3 J0.0

G3 X176.7 Y90.0 I0.0 J-3.3

G3 X180.0 Y86.7 I3.3 J0.0

H0

M5

G0 Z25.4

G0 X119.744 Y86.956

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z1.0 (Pierce Height)

M3

G4 P0.5

G1 Z0.1 F100.0 (Cut Height)

H1

G3 X120.0 Y86.7 I0.256 J0.0 F1550.0

G3 X123.3 Y90.0 I0.0 J3.3

G3 X120.0 Y93.3 I-3.3 J0.0

G3 X116.7 Y90.0 I0.0 J-3.3

G3 X120.0 Y86.7 I3.3 J0.0

H0

M5

G0 Z25.4

G0 X119.744 Y26.956

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z1.0 (Pierce Height)

M3

G4 P0.5

G1 Z0.1 F100.0 (Cut Height)

H1

G3 X120.0 Y26.7 I0.256 J0.0 F1550.0

G3 X123.3 Y30.0 I0.0 J3.3

G3 X120.0 Y33.3 I-3.3 J0.0

G3 X116.7 Y30.0 I0.0 J-3.3

G3 X120.0 Y26.7 I3.3 J0.0

H0

M5

G0 Z25.4

G0 X190.256 Y9.044

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z1.0 (Pierce Height)

M3

G4 P0.5

G1 Z0.1 F100.0 (Cut Height)

H1

G3 X190.0 Y9.3 I-0.256 J0.0 F1550.0

G1 X110.0

G2 X99.3 Y20.0 I0.0 J10.7

G1 Y100.0

G2 X110.0 Y110.7 I10.7 J0.0

G1 X190.0

G2 X200.7 Y100.0 I0.0 J-10.7

G1 Y20.0

G2 X190.0 Y9.3 I-10.7 J0.0

H0

M5

G0 Z25.4

M5 M30

(PS1550)

G codes of the one that fails (this is not the one in the youtube movie, but this is exactly the same drawing as the one above, only postprocessing after the update. :

(v1.6-sc)

G90 G94

G17

G21 (Units: Metric)

H0

G0 X48.08 Y27.67

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z3.0 (Pierce Height)

M3

G4 P1

G1 Z1.5 F100.0 (Cut Height)

H1

G3 X50.0 Y25.75 I1.92 J0.0 F1500.0

G3 X74.25 Y50.0 I0.0 J24.25

G3 X50.0 Y74.25 I-24.25 J0.0

G3 X25.75 Y50.0 I0.0 J-24.25

G3 X50.0 Y25.75 I24.25 J0.0

H0

M5

G0 Z25.4

G0 X78.4915 Y19.0077

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z3.0 (Pierce Height)

M3

G4 P1

G1 Z1.5 F100.0 (Cut Height)

H1

G3 X80.0 Y16.75 I1.8831 J-0.3746 F1500.0

G3 X83.25 Y20.0 I0.0 J3.25

G3 X80.0 Y23.25 I-3.25 J0.0

G3 X76.75 Y20.0 I0.0 J-3.25

G3 X80.0 Y16.75 I3.25 J0.0

H0

M5

G0 Z25.4

G0 X78.4915 Y79.0077

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z3.0 (Pierce Height)

M3

G4 P1

G1 Z1.5 F100.0 (Cut Height)

H1

G3 X80.0 Y76.75 I1.8831 J-0.3746 F1500.0

G3 X83.25 Y80.0 I0.0 J3.25

G3 X80.0 Y83.25 I-3.25 J0.0

G3 X76.75 Y80.0 I0.0 J-3.25

G3 X80.0 Y76.75 I3.25 J0.0

H0

M5

G0 Z25.4

G0 X18.4915 Y79.0077

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z3.0 (Pierce Height)

M3

G4 P1

G1 Z1.5 F100.0 (Cut Height)

H1

G3 X20.0 Y76.75 I1.8831 J-0.3746 F1500.0

G3 X23.25 Y80.0 I0.0 J3.25

G3 X20.0 Y83.25 I-3.25 J0.0

G3 X16.75 Y80.0 I0.0 J-3.25

G3 X20.0 Y76.75 I3.25 J0.0

H0

M5

G0 Z25.4

G0 X18.4915 Y19.0077

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z3.0 (Pierce Height)

M3

G4 P1

G1 Z1.5 F100.0 (Cut Height)

H1

G3 X20.0 Y16.75 I1.8831 J-0.3746 F1500.0

G3 X23.25 Y20.0 I0.0 J3.25

G3 X20.0 Y23.25 I-3.25 J0.0

G3 X16.75 Y20.0 I0.0 J-3.25

G3 X20.0 Y16.75 I3.25 J0.0

H0

M5

G0 Z25.4

G0 X91.92 Y-2.67

G92 Z0.

G38.2 Z-127.0 F2540.0

G38.4 Z12.7 F508.0

G92 Z0.0

G0 Z0.508 (IHS Backlash)

G92 Z0.0

G0 Z3.0 (Pierce Height)

M3

G4 P1

G1 Z1.5 F100.0 (Cut Height)

H1

G3 X90.0 Y-0.75 I-1.92 J0.0 F1500.0

G1 X10.0

G2 X-0.75 Y10.0 I0.0 J10.75

G1 Y90.0

G2 X10.0 Y100.75 I10.75 J0.0

G1 X90.0

G2 X100.75 Y90.0 I0.0 J-10.75

G1 Y10.0

G2 X90.0 Y-0.75 I-10.75 J0.0

H0

M5

G0 Z25.4

M5 M30

(PS1500)

Hope this helps