Had an unusual one that i have not had on my other FFRR or Sport

I know the heated screen comes on automaticaly straight away if the temp. is a bit low without pushing the buttons.

However when driving up & down the motorway we noticed what looked like a heat haze on the front windscreen the light for the front screen heater is off and it had not been switched on.
It is not constant however everything becomes a bit blurred it is not engine heat or inside heater, looks to me like the screen heater elements are on causing the Haze effect. The outside temp. was around 3 deg.

Anyone else had this or got any comments, thanks... 2015 SD V6 A/B

Have seen steam coming off the outside of the screen without my screen heater on but not noticed a heathaze. Onboard my ship if we have the electric window heaters (they are the same system as the RRS has) on at night the view out of the windows is all distorted due to the elements getting warm and I have noticed the same if I drive the RRS at night with the front screen heater on 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW