Offset cursor in editor after "fi"

I upgraded to new RStudio (Version 1.2.5033) on my mac (mojave 10.14.6) and now the editor window has some strange behaviour.
If I enter text containing "fi", the cursor is offseted to the right and the text is entered left to where the cursor is located.
Unfortunately "fi" is often used, not only in all files.* functions.
So far (after 2 hours) this is the only character combination to start this offset, which works only in the line after the "fi".
I never had similar troubles with any other prior RStudion version.
Thank you for your help

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