I have the same problem. CT8, a base and a satellite. The symptom is loss of internet. CT8 logs show cascades of out-of-memory errors. Cycle power, and it works for 10 minutes, or an hour, or a couple of days until it dies again.
Gigabit fiber internet. About 40 devices (smart bulbs & switches, a couple of PCs, a couple of iPads). Heaviest usage is a couple of Netflix streams.
Works fine as Access Point only. Rock solid as an access point. Worthless boat anchor when used as a router connected to the WAN. Pretty expensive boat anchor.