Invalid Response: Error: read ECONNRESET / Promise rejection

Expected behaviour

No exception occuring ;-) Recoginzed unsynced node. Found that Nelson exception was the cause.

Actual behaviour

Error log of pm2

Error: read ECONNRESET
    at _errnoException (util.js:1022:11)
    at TCP.onread (net.js:615:25)
You have triggered an unhandledRejection, you may have forgotten to catch a Promise rejection:
Error: Invalid Response: Error: read ECONNRESET
    at _errnoException (util.js:1022:11)
    at TCP.onread (net.js:615:25)
    at Object.invalidResponse (/usr/lib/node_modules/nelson.cli/node_modules/iota.lib.js/lib/errors/requestErrors.js:5:12)
    at makeRequest.prepareResult (/usr/lib/node_modules/nelson.cli/node_modules/iota.lib.js/lib/utils/makeRequest.js:285:24)
    at exports.XMLHttpRequest.request.onreadystatechange (/usr/lib/node_modules/nelson.cli/node_modules/iota.lib.js/lib/utils/makeRequest.js:71:25)
    at exports.XMLHttpRequest.dispatchEvent (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:591:25)
    at setState (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:610:14)
    at exports.XMLHttpRequest.handleError (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:532:5)
    at ClientRequest.errorHandler (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:459:14)
    at emitOne (events.js:116:13)
    at ClientRequest.emit (events.js:211:7)
    at Socket.socketErrorListener (_http_client.js:387:9)
Error: read ECONNRESET
    at _errnoException (util.js:1022:11)
    at TCP.onread (net.js:615:25)
You have triggered an unhandledRejection, you may have forgotten to catch a Promise rejection:
Error: Invalid Response: Error: read ECONNRESET
    at _errnoException (util.js:1022:11)
    at TCP.onread (net.js:615:25)
    at Object.invalidResponse (/usr/lib/node_modules/nelson.cli/node_modules/iota.lib.js/lib/errors/requestErrors.js:5:12)
    at makeRequest.prepareResult (/usr/lib/node_modules/nelson.cli/node_modules/iota.lib.js/lib/utils/makeRequest.js:285:24)
    at exports.XMLHttpRequest.request.onreadystatechange (/usr/lib/node_modules/nelson.cli/node_modules/iota.lib.js/lib/utils/makeRequest.js:71:25)
    at exports.XMLHttpRequest.dispatchEvent (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:591:25)
    at setState (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:610:14)
    at exports.XMLHttpRequest.handleError (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:532:5)
    at ClientRequest.errorHandler (/usr/lib/node_modules/nelson.cli/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:459:14)
    at emitOne (events.js:116:13)
    at ClientRequest.emit (events.js:211:7)
    at Socket.socketErrorListener (_http_client.js:387:9)
You have triggered an unhandledRejection, you may have forgotten to catch a Promise rejection:
undefined

Steps to reproduce

unknown / random occurance

Basic Info

• Operating System: Ubuntu 16.04.3 LTS

• Node (npm) Version: v8.9.4

• IRI Version: 1.4.2.4

• Nelson version: 0.4.0

Nelson Info

• Epoch: default settings
• Cycle: default settings
• Connected peers: default settings