VB app takes long time to load

I have a very small VB application that is just a calculator. I run it from the exe in the bin folder. My issue is, that it takes about 30-40 seconds for the form to open. If I close it and then run it again, it will only take 2-3 seconds. But if I try again in a few hours, it will again take 30-40 seconds. All that runs at form load is loading the form in the screenshot below. No other actions are performed at load time that would cause the delay.

The truth is, I have other small applications that have this same issue. It's been like this for years, I'm just asking about it now because it has always been annoying and I'd like to get to the bottom of it.

Any idea how to solve this?

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