SSRS report issues

Summary of the Problem

The user made changes in an SSRS report (layout updates, new fields, and font changes).
Initially everything worked, but after adding one more field and redeploying the report:

• The new change did not appear

• Even older changes stopped showing

• No build errors

• Restarting SSRS services and clearing cache did not help

The report was deployed but UI still showed old version.