Error "Unable to load DLL twApi.dll" received unexpectedly during run

Dear Community!

For one project we use the Thingworx Edge SDK for C#. Most of the time we are able to transfer data from our C# application to the cloud. But sometimes, during the application run, we unexpectedly get the following error message:

System.DllNotFoundException: Unable to load DLL 'twApi.dll': Attempt to access invalid address. (Exception from HRESULT: 0x800701E7)
at com.thingworx.communications.client.TwApiWrapper.twW_SetLoggerProperties(TwApiLogLevel level, Byte isVerboseEnabled, TwLogMessageDelegate onLogMessage)
at com.thingworx.communications.client.TwApiWrapper.ConfigureTwApiLogger()
at com.thingworx.communications.client.TwApiWrapper.Initialize(ClientConfigurator config)
at com.thingworx.communications.client.BaseClient.initialize()
at com.thingworx.communications.client.BaseClient..ctor(ClientConfigurator config)
at com.thingworx.communications.client.ConnectedThingClient..ctor(ClientConfigurator config)
at My.Project.Class.Communication.ThingworxClient..ctor(ClientConfigurator config)

The error message seems strange since the *.dll files always live in the output directory under tw/x86/ (we only use 32 bit) and sometimes even worked for hours until the error occures for the first time. I highly appreciate any hint and feedback regarding this issue.

Thank you very much!