How do you filter large IPTV Devices?

[ModdingFriendly]

I've got a IPTV device that has 132 categories and >35,000 channels (fair to say I don't need them all in NextPVR) But when I go to deselect them the checkbox jumps back up to the top so I can't scroll down. From playing with the CSS I can make it _functional_ by adding a `max_height` property to the popup box so I guess it's some js that triggers if you try to leave the main screen? 

Any troubleshooting steps I can try to help, let me know ?

[sub]

I'm not sure if you're talking about the same place I'm thinking about.

When you do 'Import Using M3U', enter the two urls, then hit 'import', it should list all the channels. You can then hit 'filter by channel group' button, untick 'select all' and it'll deselect all the groups. That popup with the groups is scrollable (and not that big), so you should just be able to scroll down the list tick the ones you want.

Are you maybe running a really low resolution on the machine you're trying use, and the popup is a little too big? On my desktop, that popup is already pretty tiny.

[ModdingFriendly]

Running on a Macbook Pro 1728x1117

[ModdingFriendly]

Sorry I attached a video but it didn't link 

https://drive.google.com/file/d/1Yv6g-NM...sp=sharing

I also notice that the buttons do nothing, if I click select all, or unselect a group nothing actually happens to the list.

[sub]

Weird - because I see this:

[sub]

Was that Safari? Maybe try Chrome if you have it.

[ModdingFriendly]

Nope this is Chrome on MacOS, but I'll give Safari a shot and see if it works better there.

Interestingly, it works perfectly fine in Safari (including the filtering)

[sub]

Weird. I just checked here in Chrome on my macbook, and it showed correctly, pretty much identical to my screenshot above.