Imap Sieve errors in 2.4.2

Hi,
I have a Dovecot docker image with last version (2.4.2).

I'm getting some errors, last time a few minutes ago, when dragging some 
emails into a folder I had just created.
...
Mar 26 10:48:20 imap([email protected])<451><wHkgJepNsLRYDtBg>: Info: 
Mailbox INBOX.carpetanueva: Mailbox created
Mar 26 10:48:24 imap([email protected])<397><x8N6YuhNMs9YDtBg>: Panic: 
file imap-sieve-storage.c: line 216 (imap_sieve_add_mailbox_event): 
assertion failed
: (ismt->src_box == NULL || ismt->src_box == src_box)
Mar 26 10:48:24 imap([email protected])<397><x8N6YuhNMs9YDtBg>: Error: 
Raw backtrace: #1 [unw_get_proc_name() failed: -10] -> #2 
[unw_get_proc_name() failed: -10] -> #3 i_panic[0x7fbaed2ee8ab] -> #4 
[unw_get_proc_name() failed: -1]
Mar 26 10:48:24 imap([email protected])<397><x8N6YuhNMs9YDtBg>: Fatal: 
master: service(imap): child 397 killed with signal 6 (core dumped)

This breaks Dovecot and I have to restart the container, but it doesn't 
fix it either. When I access again, I've receive this errors again, 
until I disable sieve in the imap.conf:

conf.d/20-imap.conf
-------------------
...
protocol imap { 
  
  

   # Space separated list of plugins to load (default is global 
mail_plugins). 
  

   mail_plugins { 
  
  

#    imap_sieve = yes 
  
  

     imap_quota = yes 
  
  

     last_login = yes 
  
  

   }

And I have to keep "imap_sieve" disabled.

Regards,
Alberto
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