UI API called on a background thread

Environment:

• VLCKit 3.0.2 (integrated using Cocoapods)
• macOS 10.13.4
• Xcode 9.4
• Swift 4.1

Expected behavior

let streamURL = URL(string: "http://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_1080p_h264.mov")
            
let playerView = NSView(frame: self.mediaPlayerView!.bounds)
playerView.autoresizingMask = [.width, .height]
self.mediaPlayerView?.addSubview(playerView)
            
self.mediaPlayer.drawable = playerView
            
let media: VLCMedia = VLCMedia(url: streamURL!)
self.mediaPlayer.media = media
            
self.mediaPlayer.play()

Stream should play without errors.

Actual behavior

When starting the playback the Main Thread Checker throws errors:

Main Thread Checker: UI API called on a background thread: -[NSView bounds]
PID: 45432, TID: 3763275, Thread name: (none), Queue name: com.apple.root.default-qos.overcommit, QoS: 21
Backtrace:
4   VLCKit                              0x00000001012bf901 Control + 305
2018-05-31 12:50:41.088367+0200 ThreadIssue[45432:3763275] [reports] Main Thread Checker: UI API called on a background thread: -[NSView bounds]
PID: 45432, TID: 3763275, Thread name: (none), Queue name: com.apple.root.default-qos.overcommit, QoS: 21
Backtrace:
4   VLCKit                              0x00000001012bf901 Control + 305
=================================================================
Main Thread Checker: UI API called on a background thread: -[NSView convertRectToBacking:]
PID: 45432, TID: 3763275, Thread name: (none), Queue name: com.apple.root.default-qos.overcommit, QoS: 21
Backtrace:
4   VLCKit                              0x00000001012bf945 Control + 373
2018-05-31 12:50:41.281648+0200 ThreadIssue[45432:3763275] [reports] Main Thread Checker: UI API called on a background thread: -[NSView convertRectToBacking:]
PID: 45432, TID: 3763275, Thread name: (none), Queue name: com.apple.root.default-qos.overcommit, QoS: 21
Backtrace:
4   VLCKit                              0x00000001012bf945 Control + 373

Steps to reproduce

Please download attached sample project, run pod install and build the project to reproduce the problem.