Maybe I'm the only one who has this, but if I want to sound Neverwinter Nights with this headset then the sound sounds good, only sometimes the sound seems to skipping, in other words: the sound sounds good but after a few minutes the sound changes momentarily like it's bouncing. It is especially when I turn on surround sound mode. Without surround mode, the sound sounds normal without skipping or stuttering. So what could this be?

Old game, not well optimized for modern setups. Do you have a dedicated sound card? Those are usually required for bug-free surround sound in older games, like this one.

Further reading:
https://pcgamingwiki.com/wiki/Neverwinter_Nights#Other_general_performance_issues
https://pcgamingwiki.com/wiki/Glossary:Sound_card#Restore_legacy_audio_effects_on_newer_OS