Freeze when jumping timeline on web browser

[Chaperone]

Hello @TheDreadPirate, thank you for your reply.

Sadly, this happens with every single file I have.
I have 100+ video files with similar specifications, and also with FLAC audio files. I have this same issue on all.

The FLAC files have the following specifications:

Code:

Audio
Title: FLAC - Stereo
Codec: FLAC
AVC: No
Layout: stereo
Channels: 2 ch
Bitrate: 1504 kbps
Sample rate: 44100 Hz
Bit depth: 24 bit
Default: No
Forced: No
External: No

Some additional information:

• The NAS is connected to the network using a 1 Gbps ethernet cable to the router
  
• I have a symmetrical 1 Gbps Internet connection
  
• My computer is connected using a Wi-Fi at 1200 Mbps (Wi-Fi 6, 802.11ax)
  

As as commented before, this issue is noticeable using with transcoding ON and OFF.

So, remuxing the files, is not a solution, because it will require me to remux my whole library.

I must admit that I am not 100% sure if this issue started with the latest version 10.10.3 or was before.