Rocksmith Remastered freezes after playing ANY song that uses CAPO. And new CDLC added not being read

Im definitively puzzled by this behaviour. Ive already tried to check files integrity in Steam, which lead it to download some files. It started a few months ago. Ironically more or less when Ubisoft dropped Rocksmith. Ive reached the point where i'll only play a capo song as the last one of the day knowing i'll get it freezed after that.

Ive also discovered that the game indeed crashes as soon as you tune with the capo as once it enters the song, it APPARENTLY plays as normal, BUT if you press ESC you cannot qet the pause menu, so it just plays untill it ends and then you get the two speakers background, and stuck there. You can then only force to close the game from Windows and restart it.

Just in case i'll mention that ive also discovered my game is not reading new Custom DLC ive added to the game folder. I wanted today to try Tokyo Ghoul Unravel and downloaded 2 versions along with other two cdlc, and even thout I tried several times to reload the game and wait it to read all the content, they did not show in the song menu. Just saying in case there is a connection. Any past Custom DLC is still there and working. I appreciate any hint. I've not tried to reinstall it.