Sounds like the bonding strap may be broken on your pedals, or possibly
it was not replaced properly when the tow hook was serviced. Although
fixing this may make your early warning less effective, you will be
better off in the long run.

Mike the Strike wrote:

You may get a few warning signs when approaching an electrified cloud.
My Discus 2 produces small sparks from the release handle to my left
leg! Definitely a sign that you should fly somewhere else!