The horizontal scroll button not showing when you click the "change" button in the restored window. Please see the screenshot below.
What version of Sage CRM are you using? Is this a customised screen? Have you logged this as a case with your local office. This may be a known issue fixed in a later version.
I'm Using Sage CRM 2020 R2. This is opportunity summary screen, not customized.
Make sure you are on the latest versin of Chrome, and not a Canary build. Check your zoom level, or change it and see if forces the bar to appear.
CTRL + SHIFT + DELETE and clear all browsing history (expect passwords). Close a try again.