Cocoapod dependencies no longer being bundled in app - cocoapods

Question

I have a set of projects like the one with the Podfile below that all share two common development pods.
platform :ios, '11.2'
use_frameworks!
workspace "AppWorkspace"
target 'App' do
project "App/app"
pod 'PromiseKit', :inhibit_warnings => true
pod 'LibKit', :path => '../LibKit'
pod 'LibUI', :path => '../LibUI'
target "AppBeta" do
inherit! :search_paths
end
end
The file system is laid out like:
AppProject
App
LibKit
LibUI
For brevity here's the Podspec for the LibUI since it also contains the resource bundles:
Pod::Spec.new do |s|
s.name = 'LibUI'
s.module_name = 'LibUI'
s.version = '0.1.1'
s.summary = 'A collection of UI components.'
s.description = <<-DESC
A collection of shared UI components
DESC
s.homepage = 'https://github.com/Foo/LibUI'
s.license = { :type => 'MIT', :file => 'LICENSE' }
s.author = { 'ME' => '------#---------.com' }
s.source = { :git => 'https://github.com/Foo/LibUI.git' }
s.platform = :ios
s.ios.deployment_target = '10.0'
s.swift_version = "4.0"
s.source_files = 'LibUI/Classes/**/*'
s.resource_bundles = {
'LibUIBundle' => ['LibUI/Assets/*.xib', 'LibUI/Assets/*.xcassets']
}
# s.public_header_files = 'Pod/Classes/**/*.h'
s.frameworks = 'UIKit'
end
When building and running the app, I run into this error:
dyld: Library not loaded: #rpath/PromiseKit.framework/PromiseKit
Referenced from: /Users/me/Library/Developer/CoreSimulator/Devices/486B5EFB-6F18-45A7-AA78-07D18C0909FC/data/Containers/Bundle/Application/830433F4-AA5A-402E-9A81-E2A7C6A61EA7/AppBeta.app/AppBeta
Reason: image not found
This error repeats for each of the pods until I change the Mach-O Type build setting in the Pods project from Dynamic Library to Static Library for each of them.
However, then I'm met with the following set of errors:
Unknown class _TtC8LibUI18SVTabBarController in Interface Builder file.
Unknown class _TtC8LibUI22SVNavigationController in Interface Builder file.
Unknown class _TtC8LibUI22SVNavigationController in Interface Builder file.
Could not load NIB in bundle: 'NSBundle /Users/me/Library/Developer/CoreSimulator/Devices/486B5EFB-6F18-45A7-AA78-07D18C0909FC/data/Containers/Bundle/Application/72B43E50-7A5D-4122-8CD3-09B862C5C6D4/AppBeta.app> (loaded)' with name 'MessageView''
The missing classes referenced from the storyboard file are in the LibUI pod, and the Module field is properly set to LibUI for the respective instances of those classes in Interface Builder.
The MessageView class is a member of the LibUI Pod. A class func of that class attempts to load a XIB from the resource_bundles, LibUIBundle, as follows:
let libUIBundle = Bundle(for: MessageView.self)
let resourceBundleURL = libUIBundle.resourceURL?.appendingPathComponent("LibUIBundle.bundle")
let resourceBundle = Bundle(url: resourceBundleURL!)
guard let messageView: MessageView = UINib(nibName: "MessageView", bundle: resourceBundle).instantiate(withOwner: nil, options: nil)[0] as? MessageView else { return }
This was updated recently to reflect suggestions in other SO posts I searched for.
All of this previously worked until updating to iOS 11, which we put off until recently. It seems as though the Pods project is not properly copying frameworks (when dynamically linked) and resources into my App's bundle.
I've already updated Cocoapods. I also deleted my Workspace and project files for this project, and then recreated them with the defaults---re-adding all the files back to the project---to avoid any lingering build settings that might have been affecting this situation. Am I doing something foolish? How has no one else run into this if it's a bug?
Stack
CocoaPods : 1.4.0.rc.1
Ruby : ruby 2.3.3p222 (2016-11-21 revision 56859) [universal.x86_64-darwin17]
RubyGems : 2.5.2
Host : Mac OS X 10.13.2 (17C88)
Xcode : 9.2 (9C40b)
Git : git version 2.14.3 (Apple Git-98)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : master - https://github.com/CocoaPods/Specs.git # e205fb520bcc24de216064c32914c85a2aaa25cc
LibPods - https://github.com/Foo/LibPods.git # 2c7954bf3d48a9d21ff9967fe6aa31d371e063e7
Installation Source
Executable Path: /usr/local/bin/pod
Plugins
cocoapods-deintegrate : 1.0.1
cocoapods-plugins : 1.0.0
cocoapods-search : 1.0.0
cocoapods-stats : 1.0.0
cocoapods-trunk : 1.3.0
cocoapods-try : 1.1.0

Answer 1

I finally found the relevant issues on Github that I'll link here in case anyone else comes across this:
Pods that are used by embedded dynamic frameworks can't be found in linked targets.
No 'Embed Pods frameworks' build phase when building custom framework ?