Perch Shop + SimpleMDE
Just updated to new Shop and now line 516 of PerchShop_Class is problamatic and now causing perch_shop_get_property to return null.
The SQL returns a json string, but you're checking for a count (I think that's what the issue is anyway!).
As regards to simple MDE, when there's multiple repeaters with editors on the same page, the second repeater doesn't load.