Can't edit a specific matrix field

Description

I have a matrix fields that has several types of matrix blocks including some with supertable to achieve nested matrixes.
I haven't work on this project for 1 or 2 months and today when I tried to make some changes to this field it would open.
Instead I would get a 502 Bad Gateway message. This only happens in one specific field. Other matrix fields work just fine.
This field is specially complex since it is used as a "page builder".
I checked the web.log file and seems that it looped through the same process 40 times before it crashed.
I updated craft and plugins to latest version and. I am running a docker with with nginx, ubuntu 20.04 and php 8.0.
This is the same image i rum several projects on my local environment.

Steps to reproduce

1. Go the settings -> fields
2. Click edit on the selected field

Additional info

• Craft version: Craft Pro 3.6.12
• PHP version: 8.0.1
• Database driver & version: MySQL 5.5.5 (maria db)
• Plugins & versions:
  Activity 1.0.1
  Amazon S3 1.2.11
  Assets Usage 2.2.1
  Contact Form 2.2.7
  Cookies 1.1.14
  MobileDetect 1.0.2
  Redactor 2.8.6
  Redirect Manager 1.1.1
  Super Dynamic Fields 1.0.5
  Super Table 2.6.7
  Wordsmith 3.3.0.1
  XML Sitemap 1.3.2

In addition to this, all system requirements are matched.

Start by reproducing the failure through Settings → Fields and inspect web.log while opening the specific matrix field. Compare its nested Matrix and Super Table configuration with fields that still open, using the listed Craft and plugin versions as context. Done means the affected field opens without a 502 response or repeated process loop.