Ending an aya (or pausing) on the letter haa

In sura 99 (az zalzalah) many of the ayats end on the letter haa, however upon listening to a few recitations, all recitors pronounce the haa, eg first aya: > زِلۡزَالَهَا "...zilzalaha" instead of "...zilzalah" without the extra syllable at the end. Furthermore, when listening to another sura, sura Bayyina (sura 98), within the sixth aya there is a pause on the word "feeha": > إِنَّ ٱلَّذِينَ كَفَرُواْ مِنۡ أَهۡلِ ٱلۡكِتَـٰبِ وَٱلۡمُشۡرِكِينَ فِى نَارِ جَهَنَّمَ خَـٰلِدِينَ فِيہَآ‌ۚ أُوْلَـٰٓٮِٕكَ هُمۡ شَرُّ ٱلۡبَرِيَّةِ "Inna l-lazeena kafaru min ahli l-kitaabi wa l-mushrikeena fee nari jahannama khaalideena feeha; ulaa-ika hum sharru l-bareeyah" (taken from Quran411). All the recitations I have listened to pronounce it as "... khaalideena feeha" not "...khaalideena feeh" (with a soft h sound). My question is do I always have to pronounce the extra syllable when ending on a haa. From what I understand, if the last letter before pausing has a fatha then we should replace it with a sukoon (for example sura 114 second aya "... khalaq" not "khalaqa") however perhaps this does not apply for the letter haa? I simply do not understand. I know this many seem like a very small issue of mine however I am trying to learn how to read the quran and am not sure if it is just a general rule to pronounce the letter haa. Thank you in advance!