Just noticed this morning by pachanoii has some nasty looking patches on it.
Background of plant - purchased a few weeks ago, dug it out of very wet and dense soil. Washed the roots and let it dry for about 3 days (it was perfectly dry by the time a replanted it) it is planted in my usual soil mix - sand, scoria, sifted potting mix. the mix was and is perfectly dry.
The plant is situated on the covered decking area, we have had some pretty chilly days but the pachanoii next to it does not have any of the same marks.
The following are some pics of the patches.
Hopefully it's nothing too bad.