App Version: 60.0.3112.55 Beta
iOS Version: 10.2.1,11.0.0
Device: iPhone, iPad
URL: mail.google.com

Steps to reproduce:
1. Sign in to chrome
2. Load mail.google.com
3. Tap on tools 
4. Load mail.google.com in new tab page
5. Tap on tools

Observed results:
At step 3, the Find in page button is enabled but at step 5 the buttons turns disabled.

Expected results:
Find in page button should be enabled.

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: No
Bug reproducible on Safari/Firefox: Firefox: No, Safari: No
Bug reproducible on current stable build (App Version, iOS Version): yes on M59
Bug reproducible on the current beta channel build (App Version, iOS Version): yes on M60

Link to video/image:
https://drive.google.com/a/google.com/file/d/0B8Cek8RsDbF8bF9xZjVmVmFCWG8/view?usp=sharing