Tangential issue but (a) they were presumably deducting via payroll BIK tax/PRSI in respect of this benefit up to now but (b) you are also entitled to claim a tax credit yourself on these payments. Just mentioning this in case (a) your BIK tax is in arrears and/or (b) you were not claiming the tax credit which you could backdate by up to 4 years.
your employer may may switching between providers-its been known to happen that there is a week or two lapse between your old policy being cancelled and your new provider setting the scheme up.
hr should tell you straight away-if they wont you can always say that you/your partner will need your cover shortly