Pods: Custom Fields marked Required do not work with the Gutenberg Editor

Describe the bug
I've extended the Post Type and added two custom fields:
(1) simple custom defined list w/ multi select, and
(2) simple custom defined list w/ single select AND default value.

These fields display correctly in the post editor (with red asterisks, and the second custom field defaulted to correct value). However, when I do a test post where I select no value for the first custom field, and leave the second custom field at default, WP allows me to publish - no errors or banners telling otherwise.

To Reproduce
Steps to reproduce the behavior:
See screenshots below.

Expected behavior
If the required custom field has no selection, the user cannot publish without filling in the required fields.

Screenshots
Extend Post Type and add custom fields.

Create a new post to test.

Pods Version

Version 2.7.12

WordPress Environment

Debug Information
WordPress Version: 5.1.1

PHP Version: 7.0.33-0ubuntu0.16.04.4

MySQL Version: 5.5.5

Server Software: nginx/1.10.3

Your User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.108 Safari/537.36

Session Save Path: /var/lib/php/sessions

Session Save Path Exists: Yes

Session Save Path Writeable: Yes

Session Max Lifetime: 1440

Opcode Cache:

Apc: No
Memcached: No
OPcache: Yes
Redis: No
Object Cache:

APC: No
APCu: No
Memcache: No
Memcached: No
Redis: No
WPDB Prefix: wp_ideas_

WP Multisite Mode: No

WP Memory Limit: 40M

Current Memory Usage: 6.380M

Current Memory Usage (real): 2.000M

Pods Network-Wide Activated: No

Pods Install Location: /srv/www/ideas/wp-content/plugins/pods/

Pods Tableless Mode Activated: No

Pods Light Mode Activated: No

Currently Active Theme: Twenty Sixteen

Currently Active Plugins:

Authors Widget: 2.4.8
FV Clone Screen Options: 0.3
Jetpack by WordPress.com: 7.1.1
List all posts by Author, nested Categories and Titles: 2.7.6
My Private Site: 2.14.2
Pods - Custom Content Types and Fields: 2.7.12
Search & Filter: 1.2.11

</details>

## Pods Package Export (helpful!)
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