Heavy lags in certain conditions

Question

I use Skobbler SDK 2.5 with a Samsung Galaxy Tab 8,4 / Kitkat 4.4 and I am experiencing heavy performance issues that start after a while when dragging in certain zoom level ranges (heavy lags, frames take about 1 second to update).

Profiling shows that it seems to be GL related (MapRenderer.render() in GLThread takes about 500ms).

It only seems to occur in certain zoom ranges, and disappears when zooming in closely or zooming out vary far. I guess that it also needs some time to occur, since on a fresh tablet restart it's working fine for a while. To me it looks like it lags when the zoom level is in kind of a "border" state between high detail and medium detail, but thats just me guessing.

Funny thing is that the demo App AndroidOpenSourceDemo is also affected, and I had the Samsung Tablet gone crash while using the app (+restart)

So I figured it might be OpenGL related, maybe some buffer fills up, and might be out of our hands, so my question is:

Is it possible to download the old SDK 2.3? I haven't found it in the official download channel, but I would like to give it a shot, since 2.4. introduced the change to the new OpenGL ES2 rendering engine.