Notes for Release 4.50

Over the past weeks we have been working on improvements to Cellosign platform. In this post you can see a list of what has been changed, updated, and/or what bugs have been fixed.

Release rollout schedule

Stage environment: Scheduled for release on: 05/10/2026

Production & Pre-Production Environments: Scheduled for release on: 18/10/2026

Enhancements

LIVE connector — Response Field Mapping (field change webhook)

The field change webhook now supports an explicit Response Mapping. Previously a returned value only landed in the form if its key matched an alias you had sent out or the exact ID of a form control — anything else was dropped. Turn on Use Response Mapping in the LIVE connector editor and add rows of alias → form control to route any returned key onto one or more controls (the same alias can fan out to several controls; each control can be targeted only once).

Off by default and fully backward compatible — existing connectors resolve responses exactly as before; no migration or API-contract change required.

📸 Screenshot placeholder — Response Mapping section in the LIVE connector editor.

Full detail: Field change webhook.

Behavior / configuration

• Before it is sent, the resolved name is passed through a file-name sanitizer so characters that are unsafe in a file name — or that could break the archive JSON payload — are normalized. This keeps the archived file name valid across Windows, macOS and Linux.
• Kept as-is: letters and digits in any language (including Hebrew), Hebrew niqqud, and the punctuation set . - _ ( ) [ ] ' + , & # @ and space.
• Every other character (slashes, colons, ?, *, |, quotes, emoji, control/zero-width characters, right-to-left overrides, etc.) is replaced with an underscore _.
• Runs of underscores or spaces are collapsed to one, and the file extension is always preserved.
• Reserved Windows names (CON, PRN, AUX, NUL, COM1–COM9, LPT1–LPT9) get a trailing underscore. The name is limited to 255 UTF-8 bytes without splitting a multi-byte character.
• Example: a configured name of invoice/2026:final is archived as invoice_2026_final.pdf.
• Backwards compatibility: when no mail_pdf_name is configured, the archived document keeps its previous name (the internal storage file name), so existing setups are unaffected until a name template is configured.

Bug fixes

• Custom font in print header and footer is now fixed.
• Agent Screen in live session: sending an invitation is now blocked.
• Accessibility: the maximum-scale attribute has been removed from the form view so users can zoom.
• Bullet repeater in the formula builder is now fixed.

Security

• Public UI has been refactored completely. As part of this rework there may be minor visual glitches in the view — please report anything you spot.
• Legacy manager application reference removed. The manager application now runs entirely on new infrastructure; the reference to the legacy application has been removed.
• Project logo size limit. The logo in project settings is now limited to 250 KB.