Tested with kamailio 5.3.0-dev7 (x86_64/linux) 4c537a (4c537a618949eb48ffed9297f3abc8cdc879b70d).
Initial (after a couple of hundred test calls)l: https://paste.ubuntu.com/p/3PNrTRf8Kw/
3881 calls later: https://paste.ubuntu.com/p/Pg6dsQ94qt/
It looks like this is still happening in the current topoh.