HomePod 2 skipping, pausing and turning up and down volume

My HomePod 2 started having issues with pausing randomly, Siri activating and volume down all the time. Whether I connect it to Apple Tv 4k or play songs on iPhone, but the problem remains the same. Is it because of the recent update 18.2? Coz its started to happen after the update, previously it was working fine till then.

I am based in India and yesterday I went to Apple authorised service centre, they were not able to understand the issue and told me it can't be repaired, and you have to replace the HomePod 2, which is like buying a new HomePod.

Need some help with this, finding what is the real issue.