Code Folding not working with PoshBot code

[glennsarti]

Originally from https://github.com/PowerShell/vscode-powershell/issues/1631

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System Details

System Details Output

### VSCode version: 1.29.1 bc24f98b5f70467bc689abf41cc5550ca637088e x64

### VSCode extensions:
CoenraadS.bracket-pair-colorizer@1.0.61
DavidAnson.vscode-markdownlint@0.21.0
eamodio.gitlens@9.0.2
EditorConfig.EditorConfig@0.12.5
eg2.tslint@1.0.40
Equinusocio.vsc-material-theme@2.6.2
kisstkondoros.vscode-codemetrics@1.17.4
ms-vscode.csharp@1.17.1
ms-vscode.PowerShell@1.10.0
wesbos.theme-cobalt2@2.1.6

### PSES version: 1.10.0.0

### PowerShell version:

Name                           Value
----                           -----
PSVersion                      5.1.17763.134
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.17763.134
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Issue Description

I am experiencing a problem with code folding. The SendMessage functions within the PoshBot Backends for slack and teams both fold rather weirdly.

Raw files: https://raw.githubusercontent.com/poshbotio/PoshBot/master/PoshBot/Implementations/Teams/TeamsBackend.ps1 https://raw.githubusercontent.com/poshbotio/PoshBot/master/PoshBot/Implementations/Slack/SlackBackend.ps1

Expected Behaviour

It should fold the entire function.

Actual Behaviour

It folds parts of the function.

[glennsarti]

Copied issue here for a legit issue number