Bluetooth Dropout - 3rd Party Wireless Buds

Hi

Has anyone had any issues with small dropouts with 3rd party buds on iPhone 13? I'm on latest iOS and have tried 3 sets of brand buds;

Earfun Pro, bluetooth 5.2 - no issue.

Edifier Neo Pro, bluetooth 5 - dropouts in the gym, not at home.

JBL Live Pro+, bluetooth 5 - dropouts in the gym, not at home.

I only get the issue in areas of high traffic (interference from other devices or systems) i.e. the gym. I can't see why it would do it on brand new buds, other than if my phone has an issue with 5.0 devices? That seems a bit strange to me though.

The JBL had more dropouts than Edifier ones, with both buds having latest firmware updates on their respective apps.

Apple support suggested going back to 15.0.1 to try that first. Again, this is fine - but I'm not sure this will fix it.....unless others have had this issue and it worked i.e. bug that needs to be updated etc at later date.

Thanks in advance.