It’s a very jarring behaviour that I haven’t seen in any other software.
There was already an old suggestion thread about this, and from @samuelclay’s comment it seems that the behaviour was turned off in 2012, yet it’s still how it works on my account hosted at newsblur.com.
Also was surprised to see that I already commented on that other thread 2 years ago, reporting the exact same thing, and there has been no developer response ever since 