Some Person has told me this following statement:
Stop making issues where they already are resting.
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It means - don't unnecessarily touch the topic when everything is smooth and calm.
Stop making issues - giving unnecessary importance to something (here some topic) or argue about it.
they (issues) are already resting - they are okay, calm and not on the rage.
So, as Victor says, let the sleeping dog lie. Don't invite trouble!
As you are an Indian, so the speaker is advising that you should not do something like आ बैल मुजे मार!