GE links are not fully standards compliant, Which is the reason they have never been certified as a “works with SmartThings” and why they have their own community FAQ for what to do when they lose network connection. Which they will.
( The GE switches are officially compatible; the GE bulbs are not.
I got rid of mine as well after the first six months and replace them with Hues on a hue bridge and have also been very happy.
While technically possible to use the Hues without the bridge, it can mess up the network for your other zigbee devices, so it’s really not recommended.