Loose Nat routing

Hello, I have a recurring routing issue with my router.
I have a configuration as shown below.

0 chain=srcnat action=src-nat to-addresses=192.168.88.4 protocol=tcp
src-address-type=!local dst-port=8087 log=yes log-prefix=“”
2 chain=dstnat action=dst-nat to-addresses=10.58.61.4 to-ports=8087
protocol=tcp in-interface-list=WAN dst-port=8087 log=no log-prefix=“”
3 chain=dstnat action=dst-nat to-addresses=10.58.61.4 to-ports=8087
protocol=tcp in-interface-list=WAN dst-port=8088 log=yes log-prefix=“”


From time to time, the connection to IP 10.58.61.4 is lost, and I have to change the IP to another one within the subnet 192.168.88.0/24 to resolve the issue. I don’t know what the problem could be.

Not really-really.
You have a configuration of which you posted a tiny snippet believing that it is the only relevant part that could cause the issue.
That may (or may not) be enough, as there may be many other places where a wrong setting may cause the issue.

Please post your whole configuration, following these instructions:
http://forum.mikrotik.com/t/forum-rules/173010/1