dovecot.index.pvt view is inconsistent

[collect at shift.agency]

Hi,

we currently work on a fresh setup coming from 2.2.13 going to 2.3.2.1
(0719df592) (Debian Dovecot Repo).

We make heavily use of Public Folder with Per-user \Seen flag and
Subscription.

namespace {
  type = public
  separator = /
  prefix = Verteiler/
  location =
maildir:/var/vmail/public/example.com/verteiler:SUBSCRIPTIONS=subscriptions/%n:INDEXPVT=~/public/example.com/verteiler
  subscriptions = yes
  hidden = no
  list = children
}

With our current version 2.2.13 this setup works. With version 2.3.2.1
we experience errors in the logfile:

Sep  8 23:12:27 mail dovecot: Error:
imap(user at example.com)<11328><e6jPlGJ1IxBOXnhS>:
/var/vmail/mailboxes/example.com/user/public/example.com/verteiler/.info/dovecot.index.pvt
view is inconsistent

dovecot.index.pvt.log is beeing created.

We found some appearance of this issue in forums but without any
sufficient solution.

Is the information provided in this email enough? What else would be
relevant?

Thank you!

Tobias