Nice, it works and won't crash anymore. Thanks!

For the further readers who has same problem and couldn't apply this patch temporarily,
below is my workaround before this patch:

1. load htable module
2. wrap a event route using htable:mod-init exported from htable
3. use $shv to substitute $sel cfg variables as cross-process global setting
4. then you can use $shv in un-patched evapi event_route ( or other modules which has similar situation, especially when async jobs to a non-main-sip process. )

loadmodule "htable.so"

event_route[htable:mod-init] {
    $shv(MYIP) = $sel(cfg_get.self.MYIP);
}

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