Would need some diagnostics - like to see what the EPG XML data is
The way the channels are selected in this filtered view is not by channel type but by what is being streamed now / in next period. So if a channel broadcasts in 720, it would be included even if it is an SD channel. Similarly an HD channel that is streaming only 480 in this period may get excluded
It was done this way to ensure all HD shows would get picked up and in some countries the channel categorization of HD/SD does not exist
If you do not believe that this was the reason for the omission of the channels, please provide logs with debug enabled covering time when the grid filter is used and I will see what the request is so you can try it in a browser and let me have the xml
