[Bug] Some encode can't seek video in Chrome

[okgame]

Hello
Please check video below.
http://www.mediafire.com/file/zywvmzq6i3eowt4/demo.mp4/file

It play well with basic mp4 method. But got issue with mediasource. Can't seek.
When seek video, player will buff infinity.
If not seek, video play normal.

Play with video tag + mp4 url: All device and browsers.
Play with mediasource: Only work with Firefox, got issue with Chrome.

Info file

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'demo.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
encoder : Google
Duration: 00:44:40.65, start: 0.000000, bitrate: 364 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x360 [SAR 1:1 DAR 16:9], 264 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : ISO Media file produced by Google Inc.
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 96 kb/s (default)
Metadata:
handler_name : ISO Media file produced by Google Inc.