Support I-frame only playback (trick play) in player and buffering logic

Hi,

I'm trying to use a trickMode track on a Dash stream to display thumbnails above the seekbar when seeking.
I've already made most development and it's working.
For the thumbnails PlayerView player, i've changed the track selection parameters so that only that trickmode track is enabled.
Now i'm trying to make that player to load as less chunks as possible, and renderer as fast a possible.
To achieve that i've use a DefaultLoadControl, with custom values for Buffer Duration parameters.

``
val loadControl = DefaultLoadControl.Builder()
.setBufferDurationsMs(1000, 5500, 1000, 1000)
.createDefaultLoadControl()
``

With this values it works fine, but for each seek i do, it downloads 3 chunks.

What i'm trying to achieve is to have each seek downloads only one chunk, since i don't need more media (i just need do show a frame of it).
I've tried to change the maxBufferMs to 2000 ms, since my chunks length is 2 seconds, but it doesn't work as expected.
If change the maxBufferMs to a value lower than 5500 ms, on some seek operations (normally the first after player.prepare) the player will never change to STATE_READY, and will not render any media.

I've been going through the issues on github and i've saw some comments saying that lowering the maxBufferMs to extreme low values could break the playback, which i think it's what is happening to me.
I've also have been looking through the exoplayer code to try to understand why this is happening, and if there's a way i could go around it, but so far i didn't find anything very helpful.

Can help me with this?
Do you think there's a way to achieve what i'm trying to do?
Can you give me any directions on where to look to try to understand the problem?

Thanks in advance