Search bar missing on mobile version of site

[alice-doremi]

My site is doremionline.com.my ,my site search bar appear only few second and gone for mobile version, but it work normally on desktop version.
Anyone can assist?

[BSS-TekLabs]

Hello @alice-doremi 
Our team is ready to help you.
Please share your website address and access password (if necessary) so that we can check and assist you.

[BSSCommerce-B2B]

Hi @alice-doremi,
Step 1. Go to Admin -> Online store -> Theme > Edit code

Step 2. Find the file theme.css. Search for the CSS snippet as I mark here

Step 3: Add important after "display: block"
It will look like this

.portable-show {
   display: block!important;
}

Result 

If it helps you, please like and mark it as the solution.

Best Regards

[alice-doremi]

Hi, I've tried and it still pop up a second then gone

[BSSCommerce-B2B]

@alice-doremi ,

I believe the "hide"  attribute here is the reason why your search bar is hidden. Try to locate this code in your theme. Look for it in files containing the words 'search', 'header', or possibly in 'theme.liquid'. If you can't find it, try downloading your theme and using an IDE to search for it. If you still can't find it, you can send it to me, and I'll help you.

try to find it like