Sorry to hear that, can you please provide a session id so that I can check to make sure you are picking up the bits with the change?
Hmm it appears your application was published with 3.18102 version of the web studio which is why the zooming doesn't work.
Can you please do the following?
1. Go to web.powerapps.com
2. Edit the app that you need from there (this should open up a new version of the studio and should pick up the 3.18103 version)
3. Republish the app from that version
4. Play your app and try the zoom again.
You can verify that you are on the newer version by going to the Accounts page.
I tried republishing the app but the issue still persists.
Current published version: 3.18105.12
Session ID: 839eace6-59ab-4243-97ec-a5b8fcc104e4
Browsers : Chrome, Edge