multiple load and restore cycles of worldmap is causing crash

This crash occurs after 10-15 times saving an ARWorldMap to disk + restoring it with an ARWorldtrackingconfiguration and planeDetection enabled. It is somehow connected to a corrupted worldmap as it also occurs when restarting the app and running a configuration with the worldMap. Another reason could be a limit for anchors/planeAnchors in one session?

Has anyone been able to fix a similar error? How can I locate the root cause?

I am very grateful of any help