Missing hint text in Internet Explorer 9 when using two forms
I need to create a page with two forms. One form is used for Contact Us and the other one for Resource Download. I am using the hint text feature for field labels. It works fine except in IE9, where only one of the forms contains hint text. Here is a stripped down example:
Test Landing Page with Two Forms
IE9 renders the hint text in only one of the forms and leaves blank fields in the other one. It seems to be random which one. Here is an example:

In more recent browser such as IE11, the results look as they should:

Upon investigating this I found that IE11 supports the hint text (a.k.a. placeholders) natively while IE9 does not and Marketo uses a JS library to simulate the desired behavior. Did anybody else encounter this issue and if so, were you able to solve it?