It's always worth submitting a fault report for the most speedy fix. Some hosts won't even look into a problem unless they receive multiple reports, and as the saying goes 'the squeaky wheel gets the grease'
Having said that, resolver issues are probably more common than most people would realise (especially on a server rather than a client machine due to the frequency (or lack of) the need for its use (clients use them constantly, servers only need them when the hosted website needs to connect to a 3rd party server Eg, PayPal or shipping quotation servers, so a problem there could exist for considerable time before noticed and reported)
The actual problem can't be avoided, short outages are often caused by simple updates, and/or when the cached data gets 'dumped' and/or refreshed (often on a daily basis for data logging purposes) IOW, the problem is inevitable and usually so shortlived that no one will notice. It's only worth reporting if it persists for a couple of minutes or more.
Cheers
RodG
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