bridge port received packet with own address as source address, probably loop

hello
i have 2 lhg and i config it as ap and st
in both of the i create bridge and add ether and wlan on bridge
i connect them but on station i got this error (bridge port received packet with own address as source address) and i cant connect each this and i cant ping device in other side
i test version 6.38 6.37 6.36 abut i git same error.i change station mode to station bridge and every thing goes fine
so now want to know what is problem?
why i got error in station mode but not in station bridge mode?
thank you

i recvd. this error today for the first time in a similar setup since i started using Mirkotik in 2013…

i see you have not been replied by anyone yet.