Image preview while writing toot is displaced to the posted image

[fungalcofe]

Describe the bug
When I post an image I have the ability to change the center of view to the released toot. When it's send, it lightly misplaced.

To Reproduce
Steps to reproduce the behavior:

1. Open toot writing menu
2. Load an image
3. Change the image visualization
4. Send the toot
5. The image don't match with the selected visualization

Expected behavior
The Image should be exactly like we select in the send toot menu

Environment (please complete the following information):

• OS: Windows
• Browser: Firefox 65.0
• Mastodon instance: niu.moe

Screenshots

Preview (regular file)

Sent (regular file)

Preview (large width, small height)

Sent (large width, small height)

[Eskuero]

Sorry for the extreme delay. I've been unable to reproduce or completely understand the issue.

At first sight it seems like an issue with mastodon rather than the extension, although maybe the autoexpanding of timelines may be causing some harm, can you try with that setting disabled on the extension's options?