if the issue persists vs if the issue persist

Some examples from the web:

• I have already told Mr Van Orden that the issue is being monitored by the President's Cabinet, that action has already been undertaken and that, if necessary, the President will personally see to this matter if the situation persists.
• Good social policy will not prevent exclusion if the issues of equality of education and its high quality are ignored.
• If the issue involves, as your patch suggests, fish and wildlife, have at it.
• If the issue involves, as your patch suggests, fish and wildlife, have at it.
• As Article 3 (on incitement) also overlaps with investigative methods, it would be clearer if the issue as such were addressed.
• If the EU wishes to make its human rights policy towards third countries more credible, scrutiny of the issues under discussion is needed.
• I wonder if the matter has been shunted backwards and forwards between different EU Commissioners without anyone in the end taking real responsibility for the issue.
• What if the issue is outside this room?
• There might be a perceptible impact on achieving the objectives if the SME sector did not identify itself with the issue of energy efficiency.
• If the issue has already been dealt with by a national court/authority, please attach a copy of the judgement/decision, if available.
• If the issue is not resolved, it may be referred to the hearing officer for independent review.
• An energetic approach is needed, but so too is sensitivity, if the issues are to be addressed seriously.
• If the urgent procedure is accepted, the European Parliament will debate the issue on Tuesday 25 September.
• Emerging techniques will fit in all the better if the issues are specified in advance.
• The issues of human rights, humanitarian aid, land reform and rural development need to be vigorously pursued if the agreement is to be completely successful.
• I'm going to arrange some tests and maybe a scan, to tell us if the issue's psychiatric or physical.
• If the Honourable Member wants to provide additional information concerning the future development of this plan, the Commission will examine the issue further.
• The US has warned that it could take the issue to the WTO if the EU adopts a too-strict definition of vodka.
• Let me just say that if the negotiated Treaty on the Constitution comes into force, that will do something to resolve the issue.
• Even if the vote had no binding force, it showed that there are many different opinions in the country on the issue of Europe.

Some examples from the web:

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