Tap here to change keyboard

I have a Keyman keyboard embedded in an app.

Every time I open Search, it pops up a message saying “Tap here to change keyboard”.
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I don’t have a second keyboard, so I’d prefer that this message was suppressed. How can I do that?

I talked with a Keyman developer. It is only supposed to display that the first time. I have asked how we can get that information to them.

Chris Hubbard