Error codes 1757 & 721

Over the last 2/3 weeks I have been experiencing some connectivity issues when playing Star Wars Battlefront II on PS4 Pro.

After a match starts I can only play between 1 & 6 minutes before the game then freezes, finally crashing the game.

When I try to restart the game, it gives me error codes 1757 and /or 721. I have restarted the game but it tells me I am “offline” and can’t connect to the server. 

I have contacted Sony, my ISP and they tell me there is no issues their side of things.

I’ve followed the ea advice; restoring my account settings, rebooting my console and modem all to no avail.

Can soneone look look into this for me and let me know if this has been reported and is known?    I’d like to know if this is a known issue and what is being done to correct it.