Users report website access problems after we added HTTP to HTTPS redirect rule

Since adding the following to webconfig many users are complaining that intermittently they either cannot access or are 'thrown out' of our website with various errors (DNS error/proxy isn't responding/etc) and cannot regain connection. Seems to happen more after we republish. Any ideas?

<rewrite>

     <rules>

        <rule name="HTTP to HTTPS redirect" stopProcessing="true">

          <match url=".*"/>

          <conditions>

            <add input="{HTTPS}" pattern="^OFF$" ignoreCase="true"/>

          </conditions>

          <action type="Redirect" url= [our HTTPS url]"/>

        </rule>

      </rules>

    </rewrite