Steps to reproduction:
1 Log in to Studio
2 Go to Admin Panel / Content types / Content / Landing Page / Edit and in LandingPage field definition sign Translatable = true.
3 Go to Page and create new LandingPage :
a) Select f.e. one zone layout.
b)Type in "Page title" and "Page description" fields : "Eng".
c) Drag Tag block, then click on it, go to Settings and type in Content field = "<p>English tag</p>" , click on Submit and next on Publish.
d) Click on Publish
4 Create new translation for this LandingPage:
a) Go to Content / Content structure and click on Translations
b) Click on "New Translation", select German and check "Base ..." and select English.
c) Change "Title" and "Description" fieldss to "Ger" and Click on Publish.
5 Correct translation for LandingPage:
a) Go to Page, select "Siteaccess: de", click on "Ger" in Menu and go to Edit.
b) Go to Basics and change "Page title" and "Page description" fields : "Ger".
c) Click on Tag block, go to Settings and change Content field to : "<p>German tag</p>" , click on Submit and next on Publish.

In Page, "Siteaccess: site" clicking in Menu on "Eng" will display "English tag".
Problem:
When change siteaccess to de and click on "Ger" will still display "English tag" (and should "German tag").