Bug Found In Score play back

https://musescore.com/user/173013/scores/5346536
When playing this score on the website it suddenly stops producing sound at one point however it plays fine on the software. This as only happened when using the musecore 3 betas also it is worth noting that a key signature bug is found within this upload wherein the key signature is repeated upon adding measures and cannot be deleted. this also occurs with the clefs and it happens sometimes when copy and pasting.