DateTime control in a particular section does not pop up the calendar in proper position. It is displayed in the middle of the section, which is far away from the input date field. The size of the popup is larger. It works as expected in other section.

Out-of-the-box section Action is included in one of the sections present in harness. Any DateTime control present inside that section has the issue. However, it works as expected outside the section. Action is an older version out-of-the-box rule, which is applicable in PRPC 6.x to render flow actions. iFrames are used in Actions, which seem to cause the issue related to width, height, or re-positioning of elements.

It seems to be caused by a @media query with a set max-height. Moreover, it looks like the problem is similar to this one: https://pdn.pega.com/support-articles/calendar-appears-large-and-middle-screen