LOML who is severely coeliac and keeps a watching brief on these things reports that one thought that is starting to gain traction is the following.
Strawberries are increasingly being grown undercover and on straw (guess the name is a bit of a giveaway) and that there may be a transference from the straw to the strawberries of gluten and that washing may not completely remove it.
Just passing the info on. She's suffered a major setback and the only thing different in her diet are strawberries. Hence the research. Time will tell.
Either that or the damn Guar Gum in the organic coconut cream.