Dashed strokes in actions do not reproduce correctly.
Using Illustrator CC 2018, attempted to create an action that created a 0.35 pt line with a dashed stroke with the following settings: 40 pt, 5 pt, 10 pt, 5 pt, 10 pt, 5 pt.
Expected result: action sets the weight of any line to 0.35 pt with dashed settings matching the above.
Actual result: action sets the weight to 0.35, but with dashed settings of 5 pt, 0 pt, 10 pt, 5 pt, 10 pt, 5 pt. Even with different dashed settings, the first two values (first dash value and first gap value) are reproduced incorrectly.
I can't believe this is still a problem with 2020 version!
Antonio Martínez Brotons commented
This is unsolved in Illustrator CC 22.1. Basically instead of Dash1-Gap1-Dash2-Gap2... the action saves all the values as Dash1-Dash2-Dash3-Dash4... so not gaps are introduced.