I would say it is normal.
A propex uses relatively lot of gas. Expansion in the regulator taking away heat so the regulator gets really cold. Moisture from the air (especially when the weather is too damp) can freeze on the cold regulator.
Zoltan
1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
5spd custom box 4.57 diff + 0.74 5th
Thanks to both for your reassurance.
I did some reading up and it seems this is perfectly normal during days' with (such as today) high humidity and using onboard accessories such as a Propex heater.
Regards
Stuart
MaxStu
1987 DG1.9 LPG Auto Autosleeper. Soon to be 2.1
"Blissfully happy in your presence".