D-Link DIR-860L b1 crash running snapshot

Just noticed the following crash message with 'dmesg':

[22245.427428] ------------[ cut here ]------------
[22245.452079] WARNING: CPU: 0 PID: 945 at backports-5.10.42-1/net/mac80211/airtime.c:457 ieee80211_ocb_leave+0x564/0x644 [mac80211]
[22245.475339] Modules linked in: pppoe ppp_async iptable_nat xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD xt_CT pppox ppp_generic nf_nat nf_flow_table_hw nf_flow_table nf_conntrack mt76x2e mt76x2_common mt76x02_lib mt76 mac80211 ipt_REJECT cfg80211 xt_time xt_tcpudp xt_multiport xt_mark xt_mac xt_limit xt_comment xt_TCPMSS xt_LOG slhc nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_filter ip_tables crc_ccitt compat ledtrig_usbport nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 leds_gpio xhci_plat_hcd xhci_pci xhci_mtk xhci_hcd gpio_button_hotplug usbcore nls_base usb_common
[22245.596217] CPU: 0 PID: 945 Comm: mt76-tx phy1 Not tainted 5.4.124 #0
[22245.609029] Stack : 00000000 8007dd54 80730000 807379bc 807a0000 80737984 807368ec 86b69c94
[22245.625653]         808e0000 87f79488 80784d63 806c6520 00000000 00000001 86b69c38 fefbca09
[22245.642267]         00000000 00000000 80920000 00000000 30232034 00000130 65746e69 2e352064
[22245.658880]         00000000 00000452 00000000 000918f9 00000000 807a0000 00000000 86a56ff0
[22245.675493]         00000009 000000c4 00000004 00000000 00000000 8038c8a0 00000000 808e0000
[22245.692104]         ...
[22245.696955] Call Trace:
[22245.701833] [<8000b64c>] show_stack+0x30/0x100
[22245.710678] [<80602e98>] dump_stack+0xa4/0xdc
[22245.719349] [<8002c130>] __warn+0xc0/0x10c
[22245.727484] [<8002c1d8>] warn_slowpath_fmt+0x5c/0xac
[22245.737470] [<86a56ff0>] ieee80211_ocb_leave+0x564/0x644 [mac80211]
[22245.750173] ---[ end trace cb4726623f29ff23 ]---

The snapshot is compiled on Jun. 13, 2021, OpenWrt SNAPSHOT, r16952-677813c776.