Strange issue with Sync-UDElement -Wait

PowerShell Universal
1 
Product: PowerShell Universal
Version: 4.2.3

I have the below code that creates 3 selects dynamically and should enable them after the previous has a value selected:

## Category Selection 1 ##########################
        $selectParams1 = @{
            Id = "Category1-$Type"
            Label = "Category 1"
            FullWidth = $true
        }
        if ($Type -eq "Edit") {
            $selectParams1['DefaultValue'] = $($Session:Categories.Category_1)
        }
        New-UDSelect @selectParams1 -Option {
            $Session:E5Cat1 | ForEach-Object {
                New-UDSelectOption -Name $_.Name -Value $_.ID
            }
        } -OnChange {
            $Session:Query_CategoryDefaults2 = "SELECT ID, Name FROM Category2 WHERE Category1_Id = $EventData ORDER BY SortOrder"
            $Session:Query_CategoryDefaults3 = $null
            Sync-UDElement -Id "Category2-$Type-Dynamic" -Wait
            Sync-UDElement -Id "Category3-$Type-Dynamic" -Wait
            Set-UDElement -Id "Category2-$Type" -Properties @{ Disabled = $false; Value = '' } 
            Set-UDElement -Id "Category3-$Type" -Properties @{ Disabled = $true; Value = '' }
        }

        ## Category Selection 2 ##########################
        $selectParams2 = @{
            Id = "Category2-$Type"
            Label = "Category 2"
            FullWidth = $true
            Disabled = $true
        }
        if ($Type -eq "Edit") {
            $selectParams2['DefaultValue'] = $($Session:Categories.Category_2)
        }
        New-UDDynamic -Id "Category2-$Type-Dynamic"  -Content {
            New-UDSelect @selectParams2 -Option {
                if ($Session:Query_CategoryDefaults2) {
                    $Session:E5Cat2 = Invoke-DbaQuery -SqlInstance $Cache:E5_ServerName -Database $Cache:E5_Database -Query $Session:Query_CategoryDefaults2
                    $Session:E5Cat2 | ForEach-Object {
                        New-UDSelectOption -Name $_.Name -Value $_.ID
                    }
                }
                else {
                    New-UDSelectOption -Name "NULL" -Value 0
                }
            } -OnChange {
                $Session:Query_CategoryDefaults3 = "SELECT ID, Name FROM Category3 WHERE Category2_Id = $EventData ORDER BY SortOrder"
                #Sync-UDElement -Id "Category3-$Type-Dynamic" -Wait
                Sync-UDElement -Id "Category3-$Type-Dynamic"
                Start-Sleep -s 1
                Set-UDElement -Id "Category3-$Type" -Properties @{ Disabled = $false; Value = '' }
            }
        }

        ## Category Selection 3 ##########################
        $selectParams3 = @{
            Id = "Category3-$Type"
            Label = "Category 3"
            FullWidth = $true
            Disabled = $true
        }
        if ($Type -eq "Edit") {
            $selectParams3['DefaultValue'] = $($Session:Categories.Category_3)
        }
        New-UDDynamic -Id "Category3-$Type-Dynamic" -Content {
            New-UDSelect @selectParams3 -Option {
                if ($Session:Query_CategoryDefaults3) {
                    $Session:E5Cat3 = Invoke-DbaQuery -SqlInstance $Cache:E5_ServerName -Database $Cache:E5_Database -Query $Session:Query_CategoryDefaults3
                    $Session:E5Cat3 | Out-File "C:\Temp\Cat3.txt"
                    $Session:E5Cat3 | ForEach-Object {
                        New-UDSelectOption -Name $_.Name -Value $_.ID
                    }
                }
                else {
                    New-UDSelectOption -Name "NULL" -Value 0
                }
            }
        }
    }

The select 2 object works fine, when select 1 has a value change it enables and refreshes the data in there. Select 3 on the other hand, doesnt work with Sync-UDElement -Wait it stays disabled. The only way i can fix this currently is to revert the select 2 OnChange event to what i was doing prior to the -Wait command being available. Basically just doing a normal Sync-UDElement with a sleep after. This works unless you click around too fast.

Theres no errors that i can see, it just doesnt seem to sync when theres two or more with the -Wait parameter.