Daytime (LED) Running Lights Problem

Someone else also asked this question was  on the "Coachbuilt" forum... but there were no replies.
On our 2013 Symbol, after some time driving, the number of LED's goes down from 5 to 2 on each side.  If the ignition is switched off and back on, the number goes back up to 5, and then after some time the failure repeats.   The LEDs seem to go off more quickly on a hot day - for example after just a few minutes last week.
Does anyone else see this?

PS: Maybe your Running Lights do this and you haven't noticed - we didn't until someone told us!

In the thread you refer to there was a Kemerton owner with the same problem...

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Just bumping this because the the vehicle is still doing this regularly - and has even been observed with one side entirely off.  Don't belive it is a loose connection - switching ignition off and on always solves it.  Anyone else see this and found a resolution?