I hope this is happening in DEV only, may be create a temporary ACL on that record and restrict it for the person working on.
Other way you can do it is restrict everything in UI page and just open it up temporarily for someone needs to work on it Explore Time Limited User Role Feature - you can do this by user as well (no need to use roles). This feature adds in house OOTB capability within the platform to grant temporary permission to users and auto revoke it as well once the role permission window ends.
