Deletion of tasks leads to error

[kannes]

If I delete tasks in Evolution, sooner or later I get error messages.

The task list backend servicing “Unnamed” has quit unexpectedly.
Some of your tasks may not be available until Evolution is restarted.

and

Failed to delete a task in the task list “decsync tasks”
Message recipient disconnected from message bus without replying

Behind the "Unnamed" service error hides this one (sometimes they switch places):

The task list backend servicing “decsync tasks” has quit unexpectedly.
Some of your tasks may not be available until Evolution is restarted.

Evolution 3.38.4-1 and evolution-decsync 1.3.0-2 on Archlinux.

[kannes]

There is nothing printed in the terminal if I launch evolution in it.

[kannes]

I can reproduce it with a task that I imported as the following ICS:

BEGIN:VTODO
STATUS:CANCELLED
CREATED:20101004T140317Z
DTSTAMP:20101004T140317Z
DTSTART:20101004T140317Z
DUE:20101004T100000Z
PRIORITY:0
SUMMARY:Censored
DESCRIPTION:Aus astrid-12345678-12345678 user.123456-1234.xml
END:VTODO

I removed the SUMMARY, the original text is of similar length and a single word as well. The numbers are timestamps I also removed.

[kannes]

It happens if the DUE timestamp is earlier than the CREATED/DTSTAMP/DTSTART ones and there is STATUS:CANCELLED. I used all three timestamps to mark the start because ICS and tasks are horrible and that was a way to get some timestamps working in both evolution and opentasks.