I’ve also been trying to connect soundcore boost to my 49 samsung smart tv, same 1 or 2 seconds playing then dropping connection as everyone elso.
On the TV, put in a request for samsung support. Then did a sound test from the menu which worked.
Connected bluetooth boost again and tried to do sound test in samsung diagnostics but it wasn’t allowed.
(I had already previously did the boost firmware update which didn’t solve it)
So exited all the menu’s turned boost off, watched TV for a bit, tried boost again, TV asked do I want to connect? said yes and lo and behold its working!
Tried turning off boost and selecting tv speakers or boost numerous times and it works every time so sorry, its working for now, but I’ve absolutely no idea as to why.
So, turned tv off while I did some things, came back to post this, turned tv on and its not working again and cant get it to work following what I did above. Stuck again now