Unexpected Bandwidth Surge: Analyzing Relume AVIF Files Issue

Bit of a weird one im hoping you guys could shed light on. We recently launched a very basic single ads landing page for a client, no CMS was required and we didn't expect bandwidth to be an issue for the level of Ad spend toward this page we're running. So we chose just the Basic site plan level for now. After a few weeks we've shot over the 10GB bandwidth quite a bit, digging in to the assets, no assets were excessively large, however, some of the top downloaded assets are files called 'relume-12345.avif'. There are 247 files that are relume-xxxx.avif contributing to the site bandwidth, but there is not a single image or file in the webflow media library that has a name containing 'relume'.. I checked on front end and those files do appear in the DOM, appear to be appropriately sized versions of the images, but in the site usage it is loading both the original files and the relume named version of the files the same number of times? is this normal behaviour? I've launched countless relume based sites and this is the first one with these duplicate files showing in site usage. Just checking this isn't a bug with anything recently changed in relume (although this makes more sense to be a webflow issue) before I recommend the client upgrades to CMS plan.