XF 2.1 Mark as read is not working anymore

MstrfBlng

Active member
Customers complain that mark as read doesn't work anymore and XF also doesn't track the threads / posts that are read.

I'm not sure what caused it and how to troubleshoot it. I have done the following things:

Enabled Redis cache in in config.php, also enabled page cache and session cache. All keys seem to populate and work.

I needed to make a snapshot of our Ubuntu VM today and eventually I rolled it back (was a rollback including system memory). Maybe something went wrong there?

I removed all Redis configs in config.php, but without success.

Any ideas how to troubleshoot this?

Edit: there are not errors logged.
 
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