Weird bug were pasted drawing filled randomly

[Thibaut5FFC]

Hi, I'm new to Animate and animation in general, a weird bug is happening and I can't find a way to resolve it.
I did some sketches of a character and copy-pasted them, but when I move the pasted sketch, part of is just filled with the color I used for the outline, and when I move it elsewhere in the work-space, other parts of it is filled.
I just don't understand why it does this.
Thank you for your responses.

[kglad]

you created the sketches in what program?

[Thibaut5FFC]

I did them in animate directly.

[kglad]

group the drawing then copy and paste.  you can break apart after  pasting.

[Thibaut5FFC]

I didn't quite understand... English isn't my primary langage sorry.

I already copy and paste the frames. Should I do it with selection tool ?

[kglad]

select the object you want to copy > click modify > group.  copy the grouped object and then paste where desired.

[Thibaut5FFC]

It worked! Thank you so much! ^^

[kglad]

you're welcome.