Environment (Required on creation):

macOS Big Sure 11.2.3

Chrome 89.0.4389.90

Description (Required on creation; please attach any relevant screenshots, stacktraces, log files, etc. to the ticket):

See attached screen recording.

Steps to reproduce (Required on creation):

Navigate to any page in an older version of the documentation, then select latest.

Also, navigate to any page in an older version of the documentation, select a header with an anchor tag, then select latest. 

Observed Behavior (Required on creation):

Current page does not persist and you are taken to the main Camunda Platform Manual page, losing your place in the documentation. If you selected a header with an anchor tag, the anchor tag persists but because the URL is incorrect you just have a rogue anchor tag that's completely irrelevant.

Expected behavior (Required on creation):

Page should only redirect to main page if content didn't exist for selected version. Otherwise, it should navigate to the version content for that page.

Root Cause (Required on prioritization):

Solution Ideas (Optional):

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