Flatpack update issues - Linux Mint [Failure when receiving data from the peer]

I keep getting this issue when trying to use the update manager in Linux Mint. Unknown how to resolve other than uninstall-reinstall. Anyone else seen this?

Delta Chat version

v2.35.0

Expected behavior

Update completes when using update manager.

Actual behavior

Update fails to complete when using update manager.

Steps to reproduce the problem

Screen snapshots

Debug logs

** This log may contain sensitive information. If you want to post it publicly, you may examine and edit it beforehand. **
DC Desktop Version: 2.35.0 (git: flathub)
Core Version: v2.35.0
Runtime: ElectronRuntime
[Versions]
electron=39.2.6
node=22.21.1
SQLite=3.46.1
[Runtime Info]
isMac=false
isAppx=false
target=electron
runningUnderARM64Translation=undefined
rpcServerPath=/app/delta/resources/app/node_modules/@deltachat/stdio-rpc-server-linux-x64/deltachat-rpc-server
isContentProtectionSupported=false
buildTimestamp=1321009871000
[Chatmail Core Info | About Current Profile]
Selected Profile ID: 1
arch=64
authserv_id_candidates=
bcc_self=1
blobdir=/home/chris/.var/app/chat.delta.desktop/config/DeltaChat/accounts/168a18de-d258-44fa-90b0-96aea0ba356f/dc.db-blobs
bot=0
configured_inbox_folder=INBOX
configured_mvbox_folder=<unset>
configured_trash_folder=<unset>
database_dir=/home/chris/.var/app/chat.delta.desktop/config/DeltaChat/accounts/168a18de-d258-44fa-90b0-96aea0ba356f/dc.db
database_encrypted=false
database_version=143
debug_assertions=Off
debug_logging=0
delete_device_after=0
delete_server_after=0
delete_to_trash=<unset>
deltachat_core_version=v2.35.0
disable_idle=false
donation_request_next_check=0
download_limit=0
fail_on_receiving_full_msg=
fetched_existing_msgs=true
fingerprint=<key failure: No self addr configured>
first_key_contacts_msg_id=
fix_is_chatmail=false
folders_configured=0
gossip_period=172800
is_chatmail=false
is_muted=false
journal_mode=wal
last_cant_decrypt_outgoing_msgs=0
last_housekeeping=0
last_msg_id=0
level=awesome
mdns_enabled=1
media_quality=0
messages_in_contact_requests=0
mvbox_move=1
num_cpus=8
number_of_chat_messages=0
number_of_chats=0
number_of_contacts=0
only_fetch_mvbox=0
private_key_count=0
private_tag=<unset>
proxy_enabled=0
public_key_count=0
quota_exceeding=0
scan_all_folders_debounce_secs=60
secondary_addrs=
selfavatar=<unset>
show_emails=2
sign_unencrypted=0
sqlite_version=3.46.1
stats_id=<unset>
stats_last_sent=0
stats_sending=false
std_header_protection_composing=
sync_msgs=1
test_hooks=
uptime=0h 1m 48s
used_transport_settings=Not configured
webxdc_realtime_enabled=true
Storage Usage:
[Blob Directory Size]: 0 B
[Database Size]: 428 KiB
[Largest Tables]:
   transports:               4 KiB,      0 rows
   tokens:                   4 KiB,      0 rows
   stats_sending_enabled_events:      4 KiB,      0 rows
   stats_sending_disabled_events:      4 KiB,      0 rows
   stats_securejoin_uipaths:      4 KiB,      0 rows
   stats_securejoin_sources:      4 KiB,      0 rows
   stats_securejoin_invites:      4 KiB,      0 rows
   stats_msgs:               4 KiB,      0 rows
   sqlite_sequence:          4 KiB,      8 rows
   smtp_status_updates:      4 KiB,      0 rows
[Webxdc With Biggest Status Update Space Usage]:
[Log]
2026-03-01T09:05:46.706Z	main/index            	INFO	""	"Deltachat Version 2.35.0 flathub 1321009871000"
2026-03-01T09:05:47.032Z	main/index            	INFO	""	"cwd /home/chris/.var/app/chat.delta.desktop/config/DeltaChat/accounts"
2026-03-01T09:05:47.050Z	main/deltachat        	INFO	""	"using deltachat-rpc-server at"	{"serverPath":"/app/delta/resources/app/node_modules/@deltachat/stdio-rpc-server-linux-x64/deltachat-rpc-server"}
2026-03-01T09:05:47.062Z	main/deltachat        	INFO	""	"HI"
2026-03-01T09:05:47.142Z	main/deltachat        	INFO	""	"Ready, starting accounts io..."
2026-03-01T09:05:47.142Z	main/deltachat        	INFO	""	"Started accounts io."
2026-03-01T09:05:47.264Z	main/menu             	INFO	""	"rebuilding menu with locale en"
2026-03-01T09:05:47.276Z	main/cleanup_temp_dir 	INFO	""	"Deleted 0 internal tmp directories"
2026-03-01T09:05:47.585Z	core/event            	WARNING	""	1	"src/context.rs:509: can not start io on a context that is not configured"
2026-03-01T09:05:47.644Z	main/tray             	INFO	""	"add icon tray"
2026-03-01T09:05:47.659Z	main/menu             	INFO	""	"rebuilding menu with locale en"
2026-03-01T09:05:47.679Z	renderer/stockstrings 	INFO	""	"loading core translations"
2026-03-01T09:05:47.782Z	core/event            	WARNING	""	1	"src/context.rs:509: can not start io on a context that is not configured"
2026-03-01T09:05:47.895Z	core/event            	INFO	""	1	"src/chat.rs:4512: Device-message changelog-version-2.3.0 already added."
2026-03-01T09:05:48.643Z	main/state            	INFO	""	"Saving state to /home/chris/.var/app/chat.delta.desktop/config/DeltaChat/config.json"
2026-03-01T09:07:34.378Z	main/menu             	INFO	""	"rebuilding menu with locale en"
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This looks like a network problem, can you download any other packages from flatpak? It could be that your internet provider is blocking dl.flathub.org

Yes, still able to download updates for other packages using whilst using a VPN and not (not sure if the VPN would make a difference).