That's not the matter.
A number of times "matter" is used in context of "issue".
The issue is not that
That is no issue
That is no issue = वह कोई मुद्दा नहीं है = That is not an issue
That is not the issue = मुद्दा वह नहीं है
पहले वाक्य में ज़ोर (emphasis) "वह" पर है, जबकि दूसरे वाक्य में मुद्दा महत्वपूर्ण है।
The issue is not that. Or the matter is not that
Mujhe is ka uttar chahiye
The issue is not that.
Can you tell me " issue is not that " - what is meaning
That is not the issue समस्या यह नहीं है
The issue is not that मुद्दा वह नहीं है