UE5.1.1/5.2/5.3 Serious Mobile Performance bug! Must be noted right now

Okay guys, Video Comprasion is done

thats the link, Please note! The fps counter is not 100% accurate. the ue5.2 feels WAY worse than 40fps. as it sutters rapidly at fast speed. yet the ue5.0.3 was MUCH more stable. i mean if the ue5.2 was not spiking fps and not stuttering thats fine. this is a big issue