App Version: 67.0.3387.0 canary
iOS Version: 10.3.3, 11.4 beta
Device: iPhone,iPad

Prerequisite:
1- Enable Voice over from device settings.

Steps to reproduce:
1. Launch chrome.
2. Tap on Menu > Settings > Tap on Report an issue.
3. Enable voice over from device settings.
4. Relaunch chrome
5. Tap on Screenshot - Highlight or hide info button.
6. Scroll the cursor in the Screenshot preview screen.

Observed results:
Background text of Send Feedback screen is read

Expected results:
Background text of Send Feedback screen should not be read.

Number of times you were able to reproduce: 5/5
Bug reproducible after clean install: Yes
Bug reproducible after clearing cache and cookies: Yes
Bug reproducible on Chrome Mobile on Android: NA
Bug reproducible on Dolphin/Safari/Firefox: NA
Bug reproducible on the current beta channel build :M65, NA (New Feature)
Bug reproducible on the current beta channel build :M66, NA (New Feature)

Link to Video :
https://drive.google.com/file/d/1Pz6Xibg-93LrCQpTwlFl_d54bXEfVyFN/view?usp=sharing