Buffering Blu-ray ISO files

So i have burnt all of my DVD and Blu-ray library and stored them on two NAS Servers, DVD (Qnap) BluRay (Thecus). I can stream the DVD’;s fine but suffer veery bad buffering of the BluRay to the IPAD on the same network. My internal network is an Orbi Mesh and has good bandwidth.

If i unstandardised this correctly this should be possible, Infuse see;a the files and scraps them correctly starts to play but then spinning wheel of buffering and i give up. Is there any thing i have missed here in the setup or something special I need to do on the Setup or playback for this?

Thanks