Speaker Costume renders differently before and after it is moved (in paint editor)

[kchadha]

Before moving in paint editor:

After moving in paint editor:

Steps to Reproduce

1. In a new scratch 3.0 project, click the Costumes tab.
2. Delete the two cat costumes.
3. Click Add costume.
4. Load the 'speaker' costume.
5. Repeat steps 3 and 4.
6. In the first costume, marquee select the speaker in the editor and move it.
7. Switch back and forth between the two costumes and notice the difference.

Operating System and Browser

e.g. Mac OS 10.11.6 Safari 10.0

[paulkaplan]

Possibly related issue with the bass drum costume. Note the difference between (a) the thumbnail, (b) the stage (c) the paint editor. (a) and (b) seem to be the "correct" rendering (same as a system viewer), but the paint editor modifies it on import and then exports the modification to the stage after an edit.