Leafs turning over

[Salty_Dog]

I have never seen this before in all the years i have grown tomatoes.

But this year i have Heirlooms and Hybribs, the Heirlooms have had the lowest set of leafs turned upside down for ages, they are also in SWC... never growing Heirlooms before, i just thought it might of been a Heirloom thing.

Now one of my Hybrids as also turned over its lower leafs (a Grossie Lisse), Mmmm now i think about it, it is also in a SWC (but an old retail style one)

The others that are just in normal panting containers (apart from one Green Zebra, which also has turned lower leafs) are growing as per normal.

Is it a sign of too much water perhaps?
Or maybe because they have been in touch with the ground/plastic?

To better explain it, it is not just the leafs that turn, its the whole branch that rotates and inverts or part inverts.

Thanks