Suddenly my TinyMCE CDN based have problem with toolbar layout. TinyMCE toolbar is stacked with each button as we can see on pictures above. After spending time trying various solutions I finally got a way to fix TinyMCE toolbar inline problem.
I’ve found that problem came with toolbar array, I don’t have idea why this error suddenly occur while there was no problem before.
See the code above, the first configuration example when an error occurs, and the next line is a way to fix it. we change the array format. Previously each row of values in the array for each key, now each new value is for the new line TinyMCE toolbar. We separated each button with space.