[nftables 0.9.2 | kernel 4.19.93] flowtable - number of devices limited (7)?

[ѽ҉ᶬḳ℠ <vtol@xxxxxxx>]

When exceeding the number of devices > 7 NFT prints:

Illegal instruction

This does not print the error:

flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan2, lan3, lan4, br-lan }; }
flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan2, lan3, lan4, br-guest }; }
flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan2, lan3, lan4, br-mgt }; }
flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan3, lan4, br-mgt, br-guest }; }
flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan3, br-mgt, br-guest, br-mgt }; }

But this prints the error:

flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan2, lan3, lan4, br-lan, br-mgt }; }
flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan2, lan3, lan4, br-guest, br-lan }; }
flowtable ft             { hook ingress priority 0; devices = {
pppoe-wan, lan0, lan1, lan2, lan3, lan4, br-mgt, br-guest }; }