One way to improve is to add JavaScript preprocessing:

var json = JSON.parse(value);

result = json.map(function (el) {
	return {
		'{#SNMPINDEX}': el['{#SNMPINDEX}']
	};
});

return JSON.stringify(result);

Fixed in:

• 7.0.12rc1 7943b790ef8
• 7.2.6rc1 149186684a7
• 7.4.0beta1 (master) 120c168f441

I have multiple Mikrotik routers, (RB5009, wAP ax, hAP ac3), after implementing this fix the temperature sensor is no longer discovered.

How can we resolve this ? 

Hello michel.lobert! My bad, I've made a mistake: the "Temperature CPU discovery" rule uses the OID from "Temperature sensor discovery", it will be fixed a bit later. Just change the OID in "SNMP OID" field for "Temperature CPU discovery":
walk[1.3.6.1.4.1.14988.1.1.3.10] -> walk[1.3.6.1.4.1.14988.1.1.3.11]

Hi Denis Rasikhov, that was indeed the solution, the CPU and Device temperature is discovered again. Thank you for the quick fix and response!