Won't fix
When using the legacy plugin Layouts and assigning Layout templates to posts, in the post edit screen the Layout metabox is missing. If the post is saved any Layout assignment is subsequently lost.
This only happens when using Toolset Blocks.
As Layouts is a legacy product, the expectation is that it will be used with the Toolset Views plugin rather than with Toolset Blocks.
Activate Toolset Views instead of Toolset Blocks and the normal post assignment functionality will be restored.
I deactivated toolset blocks and it still happens. everytime I upadate a product, i have to go an re-apply the layout to my products.
If this happens when you have Layouts active but Toolset Blocks is not active could you please create a thread in the support forum and one of our team will investigate further, thank you.
Thanks for your reply. the problem has resolved itself.
I suppose some cache file needed to refresh or something.