sipgrep show full dialog everytime

[cervajs]

i want see only invite packet

tried combination of
sipgrep '^INVITE' -M -m -A 1
sipgrep '(INVITE)' -M -m -A 1

always see trying, ringing, ....

sipgrep 2.1.0
any hint?

[oza4h07]

Have tried adding -n 1 to command ?
In my testing with Debian Bullseye's sipgrep, this ends the capture just after the INVITE.