[Elecraft] K3 encoder sensitivity?

[K2QI]

I'm curious if anyone else has noticed if their encoders, particularly the
speed/mic or filter encoders show a lack of sensitivity?  It so happens that
on my K3, turning the speed/mic encoder knob slowly sometimes doesn't
register a visual change on the LCD screen.  If I turn the encoder rapidly,
it seems to function ok.  I'm wondering if the encoder is going bad?  I
believe these particular encoders are soldered directly to the front panel
board not making replacements a "plug and play" affair.

James K2QI