Version 126.96.36.199, Mac OS Mojave
Recurring problem: I create a text frame and fill it with text. Then I shrink the text frame so that text overflows. As soon as I click on the red triangle and draw a new text frame with it, the text appears in the new/second frame in far too large a format. Previous formatting e.g. 14 pt and in the new text frame 50 pt.
This error is reproducible and appears in several of my documents.
If I then mark the entire text in both text frames and apply the original format (e.g. 14 pt) with the help of a text style, the text in the first text frame becomes very small (e.g. 2.9 pt). Here are two screenshots with before and after.