eOS FP5 only receives and plays large video MMS files, small files are thumbnails

This is absolutely bewildering - my eOS/FP5 will consistently receive small MMS videos (<3MB) as a thumbnails + a .qcp file, medium MMS videos <30-34MB as just a thumbnail and large >=34MB MMS videos. Popping the same SIM/APN values into my Pixel4a5g on LOS receives all video MMS just fine. I’ve tried several different SMS apps, so I know it’s not on that layer. It must be either something in the FP firmware or eOS. Any thoughts? (Also posted on the FP forum because I’m not sure whether this is a Fairphone or an eOS thing.)

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