Dear Maintainer,

   * What led up to the situation?

Wanting to drag an e-mail from the INBOX list and drop it into another folder.

When droping, it didn't work.

NB :This is a behavior I already had with stretch ; at first, I thought it was
only tied to the fact I usually suspend to ram my laptop for the night and only
reboot once per week or even 2 weeks, but this time it happened only 2 hours
after a reboot with no suspend at all and very few moments of use (not even
sent an e-mail.) The laptop (an MSI CX61 2PC) have 8 GB RAM, memtest+ doesn't
report any problem.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

First, I copiously cursed the Russians, D.Trump, Atilla the Hun and B.Gates,
not necessarily in this order, then I closed claws and reopened it.

   * What was the outcome of this action?

The drop function worked as expected.

   * What outcome did you expect instead?

Claws working any time as expected, although working by telepathy would be good
thing but it may be a little early for that :)