Spatial Anchors lost at bind

In our app we create and save locally spatial anchors.

when we load the anchors sometimes they lose their position and became bind to the point (0,0,0). Even if we restart the app, those spatial anchors never come back to their initial position, and we need to delete them and make new ones.

We think the cause for this may be we start loading the anchors before the space recognize as completed, but we aren't sure, and we don't find any function or property to know if the space is already "recognized".

Is there such a function? Using scene capture API maybe a good workaround?