Text flickering when removing a line on some multiline blocks

[fluiddot]

Describe the bug
When a line is deleted in some multiline blocks, specifically the Quote, Preformatted and Verse, the text lines position moves some pixels down for a frame and then goes back to the original position.

To Reproduce
Steps to reproduce the behavior:

1. Go to a post/page.
2. Add a Quote block.
3. Write some text and tap the Enter button.
4. Tap on Backspace button to remove the new line.
5. Observe that the text line moves some pixels down in a frame and then goes back to the original position.

Expected behavior
The text lines shouldn't move.

Screenshots

text-flickering-android.mp4

Smartphone (please complete the following information):

• Device: Samsung S20 FE 5G
• OS: Android 10
• Version 16.5 and 16.6-rc-2