Mail text not scrollable/covering text

REPRODUCIBILITY:
OS VERSION: 4.4.0.72
HARDWARE: xperia X compact
UI LANGUAGE: German
REGRESSION:

DESCRIPTION:

in the mail app text is not scrollable, instead it continuously covers the text

PRECONDITIONS:

STEPS TO REPRODUCE:

EXPECTED RESULT:

ACTUAL RESULT:

MODIFICATIONS:

ADDITIONAL INFORMATION: