Connection does not support idling. IMAP Account Sync Issue

I get a sync error that keeps popping up. However, I can establish a connection to the mailbox and also download mails from the server. The error only occurs after a short time.

Here is the error message:

Mailspring Version: 1.11.0-6193b33c
Platform: darwin
Account State: sync_error
Account Provider: imap
IMAP Server: mail..de
SMTP Server: mail.
.de

8837 [2023-11-05 12:56:51.639] [background] [info] syncFolderUIDRange for INBOX.Archive, UIDs: 1 - 2925, Heavy: false
8837 [2023-11-05 12:56:51.737] [foreground] [info] - INBOX: remote=101, local=101, remoteUID=5JCu7zMo5BiBtw3YHgAsbhXKej8dDXdP1qFFJkATT
8837 [2023-11-05 12:56:51.750] [foreground] [info] Connection does not support idling. Locking until more to do…
8837 [2023-11-05 12:56:51.820] [background] [info] - INBOX.Archive: remote=1621, local=1, remoteUID=RxU9CLjmrrcb2hJXwRrRJ1ohpQbdfaDL3o9Q1pFyv
8837 [2023-11-05 12:56:51.822] [background] [info] - Fetching full headers for 1024 (of 1620 needed)
8837 [2023-11-05 12:56:51.998] [background] [critical]


*** Mailspring Sync
*** An abort error (SIGABRT) occurred during program execution:
*** system functions that detect corrupt state.


8837 [2023-11-05 12:56:52.095] [background] [critical] *** Stack trace (line numbers are approximate):
*** 0x182438cc0 pthread_kill()
*** 0x182348a40 abort()
*** 0x182347d30 err()
*** 0x21ff32ca4 _citrus_iconv_std_iconv_convert.cold.3()
*** 0x21ff327e0 _citrus_iconv_std_iconv_convert()
*** 0x18ecc7cd8 __bsd_iconv()
*** in mailsync lepMixedConv(char const*, char const*, char const*, unsigned long, char*, unsigned long*)
*** in mailsync charconv()
*** in mailsync mailmime_encoded_phrase_parse()
*** in mailsync mailcore::String::stringByDecodingMIMEHeaderValue(char const*)
*** in mailsync mailcore::Address::addressWithIMAPAddress(mailimap_address*)
*** in mailsync imap_mailbox_list_to_address_array(clist_s*)
*** in mailsync mailcore::MessageHeader::importIMAPEnvelope(mailimap_envelope*)
*** in mailsync msg_att_handler(mailimap_msg_att*, void*)
*** in mailsync mailimap_response_data_parse_progress()
*** in mailsync mailimap_cont_req_or_resp_data_parse_progress()
*** in mailsync mailimap_response_parse_progress()
*** in mailsync mailimap_response_parse_with_context()
*** in mailsync mailimap_parse_response()
*** in mailsync mailimap_uid_fetch_qresync_vanished()
*** in mailsync mailcore::IMAPSession::fetchMessages(mailcore::String*, mailcore::IMAPMessagesRequestKind, bool, mailimap_set*, mailcore::IndexSet*, mailcore::IndexSet*, unsigned long long, mailcore::HashMap*, mailcore::IMAPProgressCallback*, mailcore::Array*, mailcore::ErrorCode*)
*** in mailsync mailcore::IMAPSession::fetchMessagesByUIDWithExtraHeaders(mailcore::String*, mailcore::IMAPMessagesRequestKind, mailcore::IndexSet*, mailcore::IMAPProgressCallback*, mailcore::Array*, mailcore::ErrorCode*)
*** in mailsync SyncWorker::syncFolderUIDRange(Folder&, mailcore::Range, bool, vector*)
*** in mailsync SyncWorker::syncNow()
*** in mailsync runBackgroundSyncWorker()
*** in mailsync __tuple_leaf::get()
*** in mailsync tuple_element::type& get(tuple&)
*** in mailsync decltype(static_cast(fp)()) __invoke(main::$_6&&)
*** in mailsync void* __thread_proxy(void*)
*** 0x182433e3c thread_start()