Thousands of ItemAddedEvent at startup

I’ve installed the latest nightly snapshop (2.1.0~20170305205039-1) and get thousands of ItemAddedEvent. I just grep’ed for one item, which appears such often at startup (see log excerpt). Looks like an unnecessary loop?

2017-03-06 16:50:12.245 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:50:17.430 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:50:53.910 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:50:55.573 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:50:58.376 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:51:00.878 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:51:07.582 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:51:10.136 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:51:15.973 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:51:18.866 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.
2017-03-06 16:51:29.661 [ItemAddedEvent            ] - Item 'PlexWZPower' has been added.

Can anybody confirm this? Is just my installation or a wanted behaviour?