Hi @mindlessmoment
Welcome to the Sonos Community!
The problem being worse with specific songs I don’t really get either - that is strange.
To really find out the cause of the problem, your Sonos system needs to be interrogated. I recommend you get in touch with our technical support team who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports, and to do some real-time troubleshooting with you - I recommend a phone call.
If, however, you have trouble contacting them during office hours, feel free to submit a support diagnostic after recreating the issue and reply here with the number given and I’ll take a look for you. If you have multiple devices, please let me know which one(s) is/are affected.
I don’t think S1 will help in any way, and if you don’t already have devices running S1, you wouldn’t be able to do so anyway.
I hope this helps.