OnTriggerEnter method of the waypoint is executed continuous.

[TakahiroMiyaura]

OnTriggerEnter method of the waypoint is executed continuous.
When 'find anchor process' is executing(CloudSpatialAnchorWatcher created), it should be ignore OnTrrigerEvent process.

If the first waypoint is too close to the basepoint and you start the app between both points, the OnTriggerEnter method of the waypoint is executed immediately and the app searches for close anchors. This leads to an exception, because two watcher are created at the same time and this is currently not supported by ASA.

ref: #1 (comment)