Top Nav Bar Search Button Disappearing After Enable CDN

Hello,

I know this is not a GP issue...

But, You can find out the trouble.

When I Enable CDN, Then Search Box from menu bar disappear.

I have written a details here - https://wordpress.org/support/topic/top-nav-bar-search-button-disappearing-after-enable-cdn/

Kindly check and tell me, which file cause this error.

if you can provide me with some suggestions to avoid this... it will be great.

meanwhile, I would like to say... I have tried the plugin support method. that not work.

now the cache plugin is enabled - but optimization is OFF.

NB: it happens only when CDN Enable - not optimizations.