problem with subs and audio

[wolfgangam]

hello,

I've got some issues with audio and videos containing subs that I'm hoping someone has solution for. 
My main device I'm using is LG tv and I use the web browser, so all the issues below happened there. 

1. I was watching a movie, stopped in the middle, and when I returned later that day, there was almost no sound at all... I could hear some whispers, but it was almost all gone.
Tried to start it from the beginning and it didn't fix it  so I gave up and watched something else...

2. I had a few movies with subs that came with the movie file (don't know how it's called, ripped?) , and when trying to watch it, it was very leggy and looked like it was playing at 10 fps...
after trying to play with the settings, I was forced to replace the movie version. 
it did work fine on the PC.

3. again issue with subs within the movie file, when adding external subs to it, it shows them on the list but trying to select it doesn't work or if there is big list of subs in 10 languages , 9 of them will do nothing and one will show subs in random language...
also it's impossible to sync them in that stage, so again I'm forced to look for another version of that movie 


thanks all