That is a pretty old firmware, and I've made a lot of fixes since then. Can you try latest openwrt please?
I believe he as referring to the ath10k-ct firmware (19.07.3 is using ath10k-firmware-qca9984-ct - 2019-10-03-d622d160-1 and kmod-ath10k-ct - 4.14.180+2019-09-09-5e8cd86f-1). How can I test out a more updated version? Is it just the firmware package and kernel module I need or does this require me to compile the entire image from git and flash it to my R7800? Is it more modular than that, ie is there a repo to which I point opkg and run these two on top of 19.07.3? Thanks!