Sound Effects Issues on Nokia Asha phones playing java games

[Goldrake]

Hi everyone. On Nokia 208 and Nokia 301, when I play some Java games, specifically those with sound effects + bgms (especially Gameloft ones), the sound crashes completely after a couple of minutes, and I have to restart the phone to fix it. This doesn't happen on the Nokia 206 (which, however, is slower than the previous models, and has fewer colors on the screen). These two S40 models have 2 MB of RAM available for j2me (of 64 MB total on the Nokia 301).
Games that only have background music work perfectly, but if they only have sound effects, after a few minutes you can't hear anything anymore, even when opening other applications, and I have to restart my phone.
Does anyone know the cause of this sound issue? Perhaps a technical explanation in simplified terms, not a simple platitude like "those models suck!"
Does anyone know if this problem can be fixed? Thanks.