I have exactly the same problem and told it to iBasso. This behaviour started on the 1.2.5 release (1.2.0, 1.2.2 and 1.2.3beta don't have it). My scan takes much longer because I have >7000 mp3 files on a MicroSD card.
I advise you to send an email to them as well so that the people with loaded MicroSDs get the respect they deserve.
By the way, if you hold the power button for a few seconds when the "Media Scanning" starts you can access the home icon and bypass it.
Meanwhile, I'll use the 1.2.3 Beta until this is fixed.
So I emailed iBasso today and got pretty quick replies... the email stream is below. Pretty surprising actually....
ME:
Hi,
Sending this direct as the website seems to be down at the moment…
Since updating to 1.2.5, my DX50 scans the media every time I boot up. This takes 3 minutes and is very frustrating. Never happened on any previous firmware. Can this be changed back to when you reinsert a SDcard or add an option to auto or manual scan in the advanced menu.
Regards,
THEM:
Hi,
Please try factory reset and scan your SD card again. We didnt change anything about the media scan after the V1.2.3.
Sincerely
iBasso Audio
ME:
Gee thanks for that quick reply. I will try again but I have tried that several times and also a recovery reset and wipe too but still the same scan every boot. I am not the only one. There are many others saying the same thing on HeadFi but most of them it only takes a few seconds. Can only think something else has changed that causes this.
With my 64gb card and 5000 tracks it takes too long.
Regards,
THEM:
Hi,
There is a media scan process when boot up on every firmware version. But, it should take you less than 10 secons even you have more than 5000trakcs.
Sincerely
iBasso Audio
ME:
That is curious...
I have never seen the media scan screen at boot on any previous FW from 1.1.5 thru 1.2.3. Only when I insert a SD card and it prompts to scan. These are very slow. About 20 mins although I've not timed them because I only have had to do a scan when I have reset after a FW update.
For your info, there are no other files than 450 Flac and 4980 mp3 and my tags are cleaned. All filename are formatted track# title.extension and no more than 40 characters long.
Regards,
THEM:
Hi,
The media scan on boot up exists on the previous firmwares. It is very short, less than 10seconds. Also, it is shorter if you have less music on your SD card.
Sincerely
iBasso Audio
So, that answered nothing....
I reinstalled 1.2.5... reset, both types. I've even gone through my tags and filenames to remove "." and "," just in case they were an issue because I noticed in the album.img file the filenames were not showing correctly.
Now it's taking 7 minutes to boot.
I'm going back to 1.2.3Beta like you and staying put.
This is getting frustrating...