Netgear R7800 exploration (IPQ8065, QCA9984)

Anyone seeing these errors in dmesg? They seem to have started recently, running OpenWrt 21.02-SNAPSHOT, r16268-750b966866:

[665492.586429] ath10k_pci 0000:01:00.0: failed to lookup txq for peer_id 109 tid 2

When this happens the client gets disconnected.