FYI. This happens when Placenote library(LibPlacenote) is trying to download thumbnail:
<after loading map, it’s trying to download thumbnail>
FROM AR: Retrieving thumbnail from the cloud
LibPlacenote: thumbnail found on HD, uploading to Placenote Cloud
LibPlacenote:SyncLocalizationThumbnail(String, String, Action`3)
System.Action`3:Invoke(T1, T2, T3)
<>c__DisplayClass98_0:b__0()
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
SocialBeeCoreData: Save successful!
Syncing thumbnail!
<>c__DisplayClass102_0:b__0()
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Uploading thumbnail
System.Action`3:Invoke(T1, T2, T3)
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Syncing thumbnail!
<>c__DisplayClass102_0:b__0()
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Uploading thumbnail
System.Action`3:Invoke(T1, T2, T3)
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Syncing thumbnail!
<>c__DisplayClass102_0:b__0()
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Uploading thumbnail
System.Action`3:Invoke(T1, T2, T3)
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Syncing thumbnail!
<>c__DisplayClass102_0:b__0()
Delegate:Invoke()
MainThreadTaskQueue:Update()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
…