В IE версий 9/10/11 AJAX обычно отрабатывает только один раз. Это происходит из-за того, что браузер кэширует AJAX запросы. Для того, чтобы этого не происходило, необходимо добавить в ответ сервера следующий заголовок:
“Cache-Control”:“no-cache,no-store”
(без кавычек)
При получении данного заголовка IE не будет кэшировать AJAX запросы.
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