Fenvi FV-T919 troubles

I'm using a Fenvi FV-T919, and my wifi doesn't turn back on after sleep / after turning it off and trying to turn it on again. I've had this issue a while now. Used to run Clover then recently upgraded to Opencore, but I'm still having the same issues. (Running Catalina.) I've also had issues since day one with Bluetooth coverage being dodgy at best—keyboard and mouse constantly lag and lose connection.

I've got around these issues by using a wireless dongle and ethernet, but it would be nice to solve this. Does anyone have any suggestions for what to try?

Specs:

Opencore 0.6.0 (Catalina)

Gigabyte Z390 Gaming X

Intel Core i7 8700

RX570

submitted by /u/rhysebs
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