If you don't want to see a type of Issue, switch it off.
Open the ad account's Issues and stay on the Active tab.
Click the types button at the top right. It shows how many types are switched on, for example 8 Types.
Untick the types you don't want. Types are grouped by Broken Links, Disapprovals, Account Management and Spelling Errors.
Your choice is saved, so the types you switch off stay hidden until you switch them back on.
To see what each type covers, see Issue types explained.